[PATCH v2 0/3] staging: r8188eu: Shorten and simplify calls chain

[PATCH v2 0/3] staging: r8188eu: Shorten and simplify calls chain

[Fabio M. De Francesco]

io_ops abstraction is useless in this driver, since there is only one ops
registration. Without io_ops we can get rid of indirect calls mess and
shorten the calls chain.

Shorten the calls chain of rtw_read8/16/32() down to the actual reads.
For this purpose unify the three usb_read8/16/32 into the new
usb_read(); make the latter parameterizable with 'size'; embed most of
the code of usbctrl_vendorreq() into usb_read() and use in it the new
usb_control_msg_recv() API of USB Core.

Shorten the calls chain of rtw_write8/16/32() down to the actual writes.
For this purpose unify the four usb_write8/16/32/N() into the new
usb_write(); make the latter parameterizable with 'size'; embed most of
the code of usbctrl_vendorreq() into usb_write() and use in it the new
usb_control_msg_send() API of USB Core.

The code with the modifications was thoroughly tested by Pavel Skripkin 
using a TP-Link TL-WN722N v2 / v3 [Realtek RTL8188EUS]

Fabio M. De Francesco (2):
  staging: r8188eu: Shorten calls chain of rtw_read8/16/32()
  staging: r8188eu: Shorten calls chain of rtw_write8/16/32/N()

Pavel Skripkin (1):
  staging: r8188eu: remove _io_ops structure

 drivers/staging/r8188eu/core/rtw_io.c         | 241 +----------------
 drivers/staging/r8188eu/hal/usb_halinit.c     |   6 +-
 drivers/staging/r8188eu/hal/usb_ops_linux.c   | 242 +++++++++++-------
 drivers/staging/r8188eu/include/rtw_io.h      |  76 +-----
 drivers/staging/r8188eu/include/usb_ops.h     |   2 -
 .../staging/r8188eu/include/usb_ops_linux.h   |   8 -
 drivers/staging/r8188eu/os_dep/usb_intf.c     |   2 +-
 .../staging/r8188eu/os_dep/usb_ops_linux.c    |  40 +--
 8 files changed, 174 insertions(+), 443 deletions(-)

-- 
2.33.0

[PATCH v2 1/3] staging: r8188eu: remove _io_ops structure

[Fabio M. De Francesco]

From: Pavel Skripkin <paskripkin@gmail.com>

io_ops abstraction is useless in this driver, since there is only one ops
registration. Without io_ops we can get rid of indirect calls mess and
shorten the calls chain.

Co-developed-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
---

v1->v2: No changes.

 drivers/staging/r8188eu/core/rtw_io.c         | 241 +-----------------
 drivers/staging/r8188eu/hal/usb_halinit.c     |   6 +-
 drivers/staging/r8188eu/hal/usb_ops_linux.c   |  70 ++---
 drivers/staging/r8188eu/include/rtw_io.h      |  76 +-----
 drivers/staging/r8188eu/include/usb_ops.h     |   2 -
 .../staging/r8188eu/include/usb_ops_linux.h   |   8 -
 drivers/staging/r8188eu/os_dep/usb_intf.c     |   2 +-
 .../staging/r8188eu/os_dep/usb_ops_linux.c    |  40 +--
 8 files changed, 68 insertions(+), 377 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_io.c b/drivers/staging/r8188eu/core/rtw_io.c
index cde0205816b1..2d5cc080bf1d 100644
--- a/drivers/staging/r8188eu/core/rtw_io.c
+++ b/drivers/staging/r8188eu/core/rtw_io.c
@@ -34,224 +34,6 @@ jackson@realtek.com.tw
 #define rtw_cpu_to_le16(val)		cpu_to_le16(val)
 #define rtw_cpu_to_le32(val)		cpu_to_le32(val)
 
-u8 _rtw_read8(struct adapter *adapter, u32 addr)
-{
-	u8 r_val;
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl *pintfhdl = &pio_priv->intf;
-	u8 (*_read8)(struct intf_hdl *pintfhdl, u32 addr);
-
-
-	_read8 = pintfhdl->io_ops._read8;
-	r_val = _read8(pintfhdl, addr);
-
-	return r_val;
-}
-
-u16 _rtw_read16(struct adapter *adapter, u32 addr)
-{
-	u16 r_val;
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	u16 (*_read16)(struct intf_hdl *pintfhdl, u32 addr);
-
-	_read16 = pintfhdl->io_ops._read16;
-
-	r_val = _read16(pintfhdl, addr);
-
-	return r_val;
-}
-
-u32 _rtw_read32(struct adapter *adapter, u32 addr)
-{
-	u32 r_val;
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	u32	(*_read32)(struct intf_hdl *pintfhdl, u32 addr);
-
-	_read32 = pintfhdl->io_ops._read32;
-
-	r_val = _read32(pintfhdl, addr);
-
-	return r_val;
-}
-
-int _rtw_write8(struct adapter *adapter, u32 addr, u8 val)
-{
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	int (*_write8)(struct intf_hdl *pintfhdl, u32 addr, u8 val);
-	int ret;
-
-	_write8 = pintfhdl->io_ops._write8;
-
-	ret = _write8(pintfhdl, addr, val);
-
-
-	return RTW_STATUS_CODE(ret);
-}
-
-int _rtw_write16(struct adapter *adapter, u32 addr, u16 val)
-{
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	int (*_write16)(struct intf_hdl *pintfhdl, u32 addr, u16 val);
-	int ret;
-
-	_write16 = pintfhdl->io_ops._write16;
-
-	ret = _write16(pintfhdl, addr, val);
-
-
-	return RTW_STATUS_CODE(ret);
-}
-int _rtw_write32(struct adapter *adapter, u32 addr, u32 val)
-{
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	int (*_write32)(struct intf_hdl *pintfhdl, u32 addr, u32 val);
-	int ret;
-
-	_write32 = pintfhdl->io_ops._write32;
-
-	ret = _write32(pintfhdl, addr, val);
-
-
-	return RTW_STATUS_CODE(ret);
-}
-
-int _rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *pdata)
-{
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl *pintfhdl = (struct intf_hdl *)(&pio_priv->intf);
-	int (*_writeN)(struct intf_hdl *pintfhdl, u32 addr, u32 length, u8 *pdata);
-	int ret;
-
-	_writeN = pintfhdl->io_ops._writeN;
-
-	ret = _writeN(pintfhdl, addr, length, pdata);
-
-
-	return RTW_STATUS_CODE(ret);
-}
-int _rtw_write8_async(struct adapter *adapter, u32 addr, u8 val)
-{
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	int (*_write8_async)(struct intf_hdl *pintfhdl, u32 addr, u8 val);
-	int ret;
-
-	_write8_async = pintfhdl->io_ops._write8_async;
-
-	ret = _write8_async(pintfhdl, addr, val);
-
-
-	return RTW_STATUS_CODE(ret);
-}
-
-int _rtw_write16_async(struct adapter *adapter, u32 addr, u16 val)
-{
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	int (*_write16_async)(struct intf_hdl *pintfhdl, u32 addr, u16 val);
-	int ret;
-
-	_write16_async = pintfhdl->io_ops._write16_async;
-	ret = _write16_async(pintfhdl, addr, val);
-
-	return RTW_STATUS_CODE(ret);
-}
-
-int _rtw_write32_async(struct adapter *adapter, u32 addr, u32 val)
-{
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	int (*_write32_async)(struct intf_hdl *pintfhdl, u32 addr, u32 val);
-	int ret;
-
-	_write32_async = pintfhdl->io_ops._write32_async;
-	ret = _write32_async(pintfhdl, addr, val);
-
-	return RTW_STATUS_CODE(ret);
-}
-
-void _rtw_read_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem)
-{
-	void (*_read_mem)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pmem);
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-
-
-	if (adapter->bDriverStopped || adapter->bSurpriseRemoved)
-	     return;
-	_read_mem = pintfhdl->io_ops._read_mem;
-	_read_mem(pintfhdl, addr, cnt, pmem);
-
-}
-
-void _rtw_write_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem)
-{
-	void (*_write_mem)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pmem);
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-
-
-
-	_write_mem = pintfhdl->io_ops._write_mem;
-
-	_write_mem(pintfhdl, addr, cnt, pmem);
-
-
-}
-
-void _rtw_read_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem)
-{
-	u32 (*_read_port)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pmem);
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-
-
-
-	if (adapter->bDriverStopped || adapter->bSurpriseRemoved)
-	     return;
-
-	_read_port = pintfhdl->io_ops._read_port;
-
-	_read_port(pintfhdl, addr, cnt, pmem);
-
-
-}
-
-void _rtw_read_port_cancel(struct adapter *adapter)
-{
-	void (*_read_port_cancel)(struct intf_hdl *pintfhdl);
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-
-	_read_port_cancel = pintfhdl->io_ops._read_port_cancel;
-
-	if (_read_port_cancel)
-		_read_port_cancel(pintfhdl);
-}
-
-u32 _rtw_write_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem)
-{
-	u32 (*_write_port)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pmem);
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct	intf_hdl		*pintfhdl = &pio_priv->intf;
-	u32 ret = _SUCCESS;
-
-
-
-	_write_port = pintfhdl->io_ops._write_port;
-
-	ret = _write_port(pintfhdl, addr, cnt, pmem);
-
-
-
-	return ret;
-}
-
 u32 _rtw_write_port_and_wait(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem, int timeout_ms)
 {
 	int ret = _SUCCESS;
@@ -261,7 +43,7 @@ u32 _rtw_write_port_and_wait(struct adapter *adapter, u32 addr, u32 cnt, u8 *pme
 	rtw_sctx_init(&sctx, timeout_ms);
 	pxmitbuf->sctx = &sctx;
 
-	ret = _rtw_write_port(adapter, addr, cnt, pmem);
+	ret = rtw_write_port(adapter, addr, cnt, pmem);
 
 	if (ret == _SUCCESS)
 		ret = rtw_sctx_wait(&sctx);
@@ -269,31 +51,12 @@ u32 _rtw_write_port_and_wait(struct adapter *adapter, u32 addr, u32 cnt, u8 *pme
 	return ret;
 }
 
-void _rtw_write_port_cancel(struct adapter *adapter)
-{
-	void (*_write_port_cancel)(struct intf_hdl *pintfhdl);
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-
-	_write_port_cancel = pintfhdl->io_ops._write_port_cancel;
-
-	if (_write_port_cancel)
-		_write_port_cancel(pintfhdl);
-}
-
-int rtw_init_io_priv(struct adapter *padapter, void (*set_intf_ops)(struct _io_ops *pops))
+void rtw_init_io_priv(struct adapter *padapter)
 {
 	struct io_priv	*piopriv = &padapter->iopriv;
 	struct intf_hdl *pintf = &piopriv->intf;
 
-	if (!set_intf_ops)
-		return _FAIL;
-
 	piopriv->padapter = padapter;
 	pintf->padapter = padapter;
 	pintf->pintf_dev = adapter_to_dvobj(padapter);
-
-	set_intf_ops(&pintf->io_ops);
-
-	return _SUCCESS;
 }
diff --git a/drivers/staging/r8188eu/hal/usb_halinit.c b/drivers/staging/r8188eu/hal/usb_halinit.c
index 147c51255878..33147cbc55bb 100644
--- a/drivers/staging/r8188eu/hal/usb_halinit.c
+++ b/drivers/staging/r8188eu/hal/usb_halinit.c
@@ -1052,11 +1052,7 @@ static unsigned int rtl8188eu_inirp_init(struct adapter *Adapter)
 	u8 i;
 	struct recv_buf *precvbuf;
 	uint	status;
-	struct intf_hdl *pintfhdl = &Adapter->iopriv.intf;
 	struct recv_priv *precvpriv = &Adapter->recvpriv;
-	u32 (*_read_port)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *pmem);
-
-	_read_port = pintfhdl->io_ops._read_port;
 
 	status = _SUCCESS;
 
@@ -1065,7 +1061,7 @@ static unsigned int rtl8188eu_inirp_init(struct adapter *Adapter)
 	/* issue Rx irp to receive data */
 	precvbuf = (struct recv_buf *)precvpriv->precv_buf;
 	for (i = 0; i < NR_RECVBUFF; i++) {
-		if (!_read_port(pintfhdl, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf)) {
+		if (!rtw_read_port(Adapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf)) {
 			status = _FAIL;
 			goto exit;
 		}
diff --git a/drivers/staging/r8188eu/hal/usb_ops_linux.c b/drivers/staging/r8188eu/hal/usb_ops_linux.c
index 0cf69033c529..a87b0d2e87d0 100644
--- a/drivers/staging/r8188eu/hal/usb_ops_linux.c
+++ b/drivers/staging/r8188eu/hal/usb_ops_linux.c
@@ -97,8 +97,10 @@ static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u16 value, void *pdata,
 	return status;
 }
 
-static u8 usb_read8(struct intf_hdl *pintfhdl, u32 addr)
+u8 rtw_read8(struct adapter *adapter, u32 addr)
 {
+	struct io_priv *pio_priv = &adapter->iopriv;
+	struct intf_hdl *pintfhdl = &pio_priv->intf;
 	u16 wvalue = (u16)(addr & 0x0000ffff);
 	u8 data;
 
@@ -107,8 +109,10 @@ static u8 usb_read8(struct intf_hdl *pintfhdl, u32 addr)
 	return data;
 }
 
-static u16 usb_read16(struct intf_hdl *pintfhdl, u32 addr)
+u16 rtw_read16(struct adapter *adapter, u32 addr)
 {
+	struct io_priv *pio_priv = &adapter->iopriv;
+	struct intf_hdl *pintfhdl = &pio_priv->intf;
 	u16 wvalue = (u16)(addr & 0x0000ffff);
 	__le32 data;
 
@@ -117,8 +121,10 @@ static u16 usb_read16(struct intf_hdl *pintfhdl, u32 addr)
 	return (u16)(le32_to_cpu(data) & 0xffff);
 }
 
-static u32 usb_read32(struct intf_hdl *pintfhdl, u32 addr)
+u32 rtw_read32(struct adapter *adapter, u32 addr)
 {
+	struct io_priv *pio_priv = &adapter->iopriv;
+	struct intf_hdl *pintfhdl = &pio_priv->intf;
 	u16 wvalue = (u16)(addr & 0x0000ffff);
 	__le32 data;
 
@@ -127,40 +133,59 @@ static u32 usb_read32(struct intf_hdl *pintfhdl, u32 addr)
 	return le32_to_cpu(data);
 }
 
-static int usb_write8(struct intf_hdl *pintfhdl, u32 addr, u8 val)
+int rtw_write8(struct adapter *adapter, u32 addr, u8 val)
 {
+	struct io_priv *pio_priv = &adapter->iopriv;
+	struct intf_hdl *pintfhdl = &pio_priv->intf;
 	u16 wvalue = (u16)(addr & 0x0000ffff);
+	int ret;
 
-	return usbctrl_vendorreq(pintfhdl, wvalue, &val, 1, REALTEK_USB_VENQT_WRITE);
+	ret = usbctrl_vendorreq(pintfhdl, wvalue, &val, 1, REALTEK_USB_VENQT_WRITE);
+
+	return RTW_STATUS_CODE(ret);
 }
 
-static int usb_write16(struct intf_hdl *pintfhdl, u32 addr, u16 val)
+int rtw_write16(struct adapter *adapter, u32 addr, u16 val)
 {
+	struct io_priv *pio_priv = &adapter->iopriv;
+	struct intf_hdl *pintfhdl = &pio_priv->intf;
 	u16 wvalue = (u16)(addr & 0x0000ffff);
 	__le32 data = cpu_to_le32(val & 0x0000ffff);
+	int ret;
+
+	ret = usbctrl_vendorreq(pintfhdl, wvalue, &data, 2, REALTEK_USB_VENQT_WRITE);
 
-	return usbctrl_vendorreq(pintfhdl, wvalue, &data, 2, REALTEK_USB_VENQT_WRITE);
+	return RTW_STATUS_CODE(ret);
 }
 
-static int usb_write32(struct intf_hdl *pintfhdl, u32 addr, u32 val)
+int rtw_write32(struct adapter *adapter, u32 addr, u32 val)
 {
+	struct io_priv *pio_priv = &adapter->iopriv;
+	struct intf_hdl *pintfhdl = &pio_priv->intf;
 	u16 wvalue = (u16)(addr & 0x0000ffff);
 	__le32 data = cpu_to_le32(val);
+	int ret;
 
-	return usbctrl_vendorreq(pintfhdl, wvalue, &data, 4, REALTEK_USB_VENQT_WRITE);
+	ret = usbctrl_vendorreq(pintfhdl, wvalue, &data, 4, REALTEK_USB_VENQT_WRITE);
+
+	return RTW_STATUS_CODE(ret);
 }
 
-static int usb_writeN(struct intf_hdl *pintfhdl, u32 addr, u32 length, u8 *pdata)
+int rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *pdata)
 {
+	struct io_priv *pio_priv = &adapter->iopriv;
+	struct intf_hdl *pintfhdl = &pio_priv->intf;
 	u16 wvalue = (u16)(addr & 0x0000ffff);
 	u8 buf[VENDOR_CMD_MAX_DATA_LEN] = {0};
+	int ret;
 
 	if (length > VENDOR_CMD_MAX_DATA_LEN)
 		return -EINVAL;
 
 	memcpy(buf, pdata, length);
+	ret = usbctrl_vendorreq(pintfhdl, wvalue, buf, (length & 0xffff), REALTEK_USB_VENQT_WRITE);
 
-	return usbctrl_vendorreq(pintfhdl, wvalue, buf, (length & 0xffff), REALTEK_USB_VENQT_WRITE);
+	return RTW_STATUS_CODE(ret);
 }
 
 static void interrupt_handler_8188eu(struct adapter *adapt, u16 pkt_len, u8 *pbuf)
@@ -431,11 +456,10 @@ static void usb_read_port_complete(struct urb *purb, struct pt_regs *regs)
 	}
 }
 
-static u32 usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
+u32 rtw_read_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *rmem)
 {
 	struct urb *purb = NULL;
 	struct recv_buf	*precvbuf = (struct recv_buf *)rmem;
-	struct adapter		*adapter = pintfhdl->padapter;
 	struct dvobj_priv	*pdvobj = adapter_to_dvobj(adapter);
 	struct recv_priv	*precvpriv = &adapter->recvpriv;
 	struct usb_device	*pusbd = pdvobj->pusbdev;
@@ -534,26 +558,6 @@ void rtl8188eu_xmit_tasklet(unsigned long priv)
 	}
 }
 
-void rtl8188eu_set_intf_ops(struct _io_ops	*pops)
-{
-
-	memset((u8 *)pops, 0, sizeof(struct _io_ops));
-	pops->_read8 = &usb_read8;
-	pops->_read16 = &usb_read16;
-	pops->_read32 = &usb_read32;
-	pops->_read_mem = &usb_read_mem;
-	pops->_read_port = &usb_read_port;
-	pops->_write8 = &usb_write8;
-	pops->_write16 = &usb_write16;
-	pops->_write32 = &usb_write32;
-	pops->_writeN = &usb_writeN;
-	pops->_write_mem = &usb_write_mem;
-	pops->_write_port = &usb_write_port;
-	pops->_read_port_cancel = &usb_read_port_cancel;
-	pops->_write_port_cancel = &usb_write_port_cancel;
-
-}
-
 void rtl8188eu_set_hw_type(struct adapter *adapt)
 {
 	adapt->chip_type = RTL8188E;
diff --git a/drivers/staging/r8188eu/include/rtw_io.h b/drivers/staging/r8188eu/include/rtw_io.h
index 4b41c7b03972..9722b76533dc 100644
--- a/drivers/staging/r8188eu/include/rtw_io.h
+++ b/drivers/staging/r8188eu/include/rtw_io.h
@@ -84,30 +84,6 @@ struct intf_priv;
 struct intf_hdl;
 struct io_queue;
 
-struct _io_ops {
-	u8 (*_read8)(struct intf_hdl *pintfhdl, u32 addr);
-	u16 (*_read16)(struct intf_hdl *pintfhdl, u32 addr);
-	u32 (*_read32)(struct intf_hdl *pintfhdl, u32 addr);
-	int (*_write8)(struct intf_hdl *pintfhdl, u32 addr, u8 val);
-	int (*_write16)(struct intf_hdl *pintfhdl, u32 addr, u16 val);
-	int (*_write32)(struct intf_hdl *pintfhdl, u32 addr, u32 val);
-	int (*_writeN)(struct intf_hdl *pintfhdl, u32 addr, u32 length,
-		       u8 *pdata);
-	int (*_write8_async)(struct intf_hdl *pintfhdl, u32 addr, u8 val);
-	int (*_write16_async)(struct intf_hdl *pintfhdl, u32 addr, u16 val);
-	int (*_write32_async)(struct intf_hdl *pintfhdl, u32 addr, u32 val);
-	void (*_read_mem)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt,
-			  u8 *pmem);
-	void (*_write_mem)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt,
-			   u8 *pmem);
-	u32 (*_read_port)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt,
-			  u8 *pmem);
-	u32 (*_write_port)(struct intf_hdl *pintfhdl, u32 addr, u32 cnt,
-			   u8 *pmem);
-	void (*_read_port_cancel)(struct intf_hdl *pintfhdl);
-	void (*_write_port_cancel)(struct intf_hdl *pintfhdl);
-};
-
 struct io_req {
 	struct list_head list;
 	u32	addr;
@@ -125,7 +101,6 @@ struct io_req {
 struct	intf_hdl {
 	struct adapter *padapter;
 	struct dvobj_priv *pintf_dev;
-	struct _io_ops	io_ops;
 };
 
 struct reg_protocol_rd {
@@ -245,58 +220,34 @@ void unregister_intf_hdl(struct intf_hdl *pintfhdl);
 void _rtw_attrib_read(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
 void _rtw_attrib_write(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
 
-u8 _rtw_read8(struct adapter *adapter, u32 addr);
-u16 _rtw_read16(struct adapter *adapter, u32 addr);
-u32 _rtw_read32(struct adapter *adapter, u32 addr);
-void _rtw_read_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
-void _rtw_read_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
-void _rtw_read_port_cancel(struct adapter *adapter);
+u8 rtw_read8(struct adapter *adapter, u32 addr);
+u16 rtw_read16(struct adapter *adapter, u32 addr);
+u32 rtw_read32(struct adapter *adapter, u32 addr);
+u32 rtw_read_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
+void rtw_read_port_cancel(struct adapter *adapter);
 
-int _rtw_write8(struct adapter *adapter, u32 addr, u8 val);
-int _rtw_write16(struct adapter *adapter, u32 addr, u16 val);
-int _rtw_write32(struct adapter *adapter, u32 addr, u32 val);
-int _rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *pdata);
+int rtw_write8(struct adapter *adapter, u32 addr, u8 val);
+int rtw_write16(struct adapter *adapter, u32 addr, u16 val);
+int rtw_write32(struct adapter *adapter, u32 addr, u32 val);
+int rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *pdata);
 
 int _rtw_write8_async(struct adapter *adapter, u32 addr, u8 val);
 int _rtw_write16_async(struct adapter *adapter, u32 addr, u16 val);
 int _rtw_write32_async(struct adapter *adapter, u32 addr, u32 val);
 
-void _rtw_write_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
-u32 _rtw_write_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
+u32 rtw_write_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
 u32 _rtw_write_port_and_wait(struct adapter *adapter, u32 addr, u32 cnt,
 			     u8 *pmem, int timeout_ms);
-void _rtw_write_port_cancel(struct adapter *adapter);
-
-#define rtw_read8(adapter, addr) _rtw_read8((adapter), (addr))
-#define rtw_read16(adapter, addr) _rtw_read16((adapter), (addr))
-#define rtw_read32(adapter, addr) _rtw_read32((adapter), (addr))
-#define rtw_read_mem(adapter, addr, cnt, mem)				\
-	_rtw_read_mem((adapter), (addr), (cnt), (mem))
-#define rtw_read_port(adapter, addr, cnt, mem)				\
-	_rtw_read_port((adapter), (addr), (cnt), (mem))
-#define rtw_read_port_cancel(adapter) _rtw_read_port_cancel((adapter))
-
-#define  rtw_write8(adapter, addr, val)					\
-	_rtw_write8((adapter), (addr), (val))
-#define  rtw_write16(adapter, addr, val)				\
-	_rtw_write16((adapter), (addr), (val))
-#define  rtw_write32(adapter, addr, val)				\
-	_rtw_write32((adapter), (addr), (val))
-#define  rtw_writeN(adapter, addr, length, data)			\
-	_rtw_writeN((adapter), (addr), (length), (data))
+void rtw_write_port_cancel(struct adapter *adapter);
+
 #define rtw_write8_async(adapter, addr, val)				\
 	_rtw_write8_async((adapter), (addr), (val))
 #define rtw_write16_async(adapter, addr, val)				\
 	_rtw_write16_async((adapter), (addr), (val))
 #define rtw_write32_async(adapter, addr, val)				\
 	_rtw_write32_async((adapter), (addr), (val))
-#define rtw_write_mem(adapter, addr, cnt, mem)				\
-	_rtw_write_mem((adapter), (addr), (cnt), (mem))
-#define rtw_write_port(adapter, addr, cnt, mem)				\
-	_rtw_write_port((adapter), (addr), (cnt), (mem))
 #define rtw_write_port_and_wait(adapter, addr, cnt, mem, timeout_ms)	\
 	_rtw_write_port_and_wait((adapter), (addr), (cnt), (mem), (timeout_ms))
-#define rtw_write_port_cancel(adapter) _rtw_write_port_cancel((adapter))
 
 void rtw_write_scsi(struct adapter *adapter, u32 cnt, u8 *pmem);
 
@@ -340,8 +291,7 @@ void async_write32(struct adapter *adapter, u32 addr, u32 val,
 void async_write_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
 void async_write_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
 
-int rtw_init_io_priv(struct adapter *padapter,
-		     void (*set_intf_ops)(struct _io_ops *pops));
+void rtw_init_io_priv(struct adapter *padapter);
 
 uint alloc_io_queue(struct adapter *adapter);
 void free_io_queue(struct adapter *adapter);
diff --git a/drivers/staging/r8188eu/include/usb_ops.h b/drivers/staging/r8188eu/include/usb_ops.h
index c53cc54b6b87..1939b781b097 100644
--- a/drivers/staging/r8188eu/include/usb_ops.h
+++ b/drivers/staging/r8188eu/include/usb_ops.h
@@ -21,8 +21,6 @@
 
 void rtl8188eu_set_hw_type(struct adapter *padapter);
 #define hal_set_hw_type rtl8188eu_set_hw_type
-void rtl8188eu_set_intf_ops(struct _io_ops *pops);
-#define usb_set_intf_ops rtl8188eu_set_intf_ops
 
 /*
  * Increase and check if the continual_urb_error of this @param dvobjprivei
diff --git a/drivers/staging/r8188eu/include/usb_ops_linux.h b/drivers/staging/r8188eu/include/usb_ops_linux.h
index c357a3b1560e..641f059ffaf7 100644
--- a/drivers/staging/r8188eu/include/usb_ops_linux.h
+++ b/drivers/staging/r8188eu/include/usb_ops_linux.h
@@ -28,12 +28,4 @@
 
 unsigned int ffaddr2pipehdl(struct dvobj_priv *pdvobj, u32 addr);
 
-void usb_read_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem);
-void usb_write_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem);
-
-void usb_read_port_cancel(struct intf_hdl *pintfhdl);
-
-u32 usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem);
-void usb_write_port_cancel(struct intf_hdl *pintfhdl);
-
 #endif
diff --git a/drivers/staging/r8188eu/os_dep/usb_intf.c b/drivers/staging/r8188eu/os_dep/usb_intf.c
index bb85ab77fd26..78c91b14e637 100644
--- a/drivers/staging/r8188eu/os_dep/usb_intf.c
+++ b/drivers/staging/r8188eu/os_dep/usb_intf.c
@@ -596,7 +596,7 @@ static struct adapter *rtw_usb_if1_init(struct dvobj_priv *dvobj,
 	padapter->intf_stop = &usb_intf_stop;
 
 	/* step init_io_priv */
-	rtw_init_io_priv(padapter, usb_set_intf_ops);
+	rtw_init_io_priv(padapter);
 
 	/* step read_chip_version */
 	rtw_hal_read_chip_version(padapter);
diff --git a/drivers/staging/r8188eu/os_dep/usb_ops_linux.c b/drivers/staging/r8188eu/os_dep/usb_ops_linux.c
index 62dd4a131534..f1440a837b97 100644
--- a/drivers/staging/r8188eu/os_dep/usb_ops_linux.c
+++ b/drivers/staging/r8188eu/os_dep/usb_ops_linux.c
@@ -31,24 +31,14 @@ struct zero_bulkout_context {
 	void *padapter;
 };
 
-void usb_read_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
-{
-}
-
-void usb_write_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
-{
-}
-
-void usb_read_port_cancel(struct intf_hdl *pintfhdl)
+void rtw_read_port_cancel(struct adapter *adapter)
 {
 	int i;
-	struct recv_buf *precvbuf;
-	struct adapter	*padapter = pintfhdl->padapter;
-	precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
+	struct recv_buf *precvbuf = (struct recv_buf *) adapter->recvpriv.precv_buf;
 
 	DBG_88E("%s\n", __func__);
 
-	padapter->bReadPortCancel = true;
+	adapter->bReadPortCancel = true;
 
 	for (i = 0; i < NR_RECVBUFF; i++) {
 		precvbuf->reuse = true;
@@ -134,22 +124,21 @@ static void usb_write_port_complete(struct urb *purb, struct pt_regs *regs)
 
 }
 
-u32 usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
+u32 rtw_write_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *wmem)
 {
 	unsigned long irqL;
 	unsigned int pipe;
 	int status;
 	u32 ret = _FAIL;
 	struct urb *purb = NULL;
-	struct adapter *padapter = (struct adapter *)pintfhdl->padapter;
-	struct dvobj_priv	*pdvobj = adapter_to_dvobj(padapter);
-	struct xmit_priv	*pxmitpriv = &padapter->xmitpriv;
+	struct dvobj_priv	*pdvobj = adapter_to_dvobj(adapter);
+	struct xmit_priv	*pxmitpriv = &adapter->xmitpriv;
 	struct xmit_buf *pxmitbuf = (struct xmit_buf *)wmem;
 	struct xmit_frame *pxmitframe = (struct xmit_frame *)pxmitbuf->priv_data;
 	struct usb_device *pusbd = pdvobj->pusbdev;
 
-	if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
-	    (padapter->pwrctrlpriv.pnp_bstop_trx)) {
+	if ((adapter->bDriverStopped) || (adapter->bSurpriseRemoved) ||
+	    (adapter->pwrctrlpriv.pnp_bstop_trx)) {
 		rtw_sctx_done_err(&pxmitbuf->sctx, RTW_SCTX_DONE_TX_DENY);
 		goto exit;
 	}
@@ -196,7 +185,7 @@ u32 usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 
 	status = usb_submit_urb(purb, GFP_ATOMIC);
 	if (!status) {
-		struct hal_data_8188e	*haldata = GET_HAL_DATA(padapter);
+		struct hal_data_8188e	*haldata = GET_HAL_DATA(adapter);
 
 		haldata->srestpriv.last_tx_time = jiffies;
 	} else {
@@ -205,7 +194,7 @@ u32 usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 
 		switch (status) {
 		case -ENODEV:
-			padapter->bDriverStopped = true;
+			adapter->bDriverStopped = true;
 			break;
 		default:
 			break;
@@ -224,15 +213,14 @@ u32 usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 	return ret;
 }
 
-void usb_write_port_cancel(struct intf_hdl *pintfhdl)
+void rtw_write_port_cancel(struct adapter *adapter)
 {
 	int i, j;
-	struct adapter	*padapter = pintfhdl->padapter;
-	struct xmit_buf *pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmitbuf;
+	struct xmit_buf *pxmitbuf = (struct xmit_buf *) adapter->xmitpriv.pxmitbuf;
 
 	DBG_88E("%s\n", __func__);
 
-	padapter->bWritePortCancel = true;
+	adapter->bWritePortCancel = true;
 
 	for (i = 0; i < NR_XMITBUFF; i++) {
 		for (j = 0; j < 8; j++) {
@@ -242,7 +230,7 @@ void usb_write_port_cancel(struct intf_hdl *pintfhdl)
 		pxmitbuf++;
 	}
 
-	pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmit_extbuf;
+	pxmitbuf = (struct xmit_buf *) adapter->xmitpriv.pxmit_extbuf;
 	for (i = 0; i < NR_XMIT_EXTBUFF; i++) {
 		for (j = 0; j < 8; j++) {
 			if (pxmitbuf->pxmit_urb[j])
-- 
2.33.0

[PATCH v2 2/3] staging: r8188eu: Shorten calls chain of rtw_read8/16/32()

[Fabio M. De Francesco]

Shorten the calls chain of rtw_read8/16/32() down to the actual reads.
For this purpose unify the three usb_read8/16/32 into the new
usb_read(); make the latter parameterizable with 'size'; embed most of
the code of usbctrl_vendorreq() into usb_read() and use in it the new
usb_control_msg_recv() API of USB Core.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
---

v1->v2: No changes.

 drivers/staging/r8188eu/hal/usb_ops_linux.c | 92 +++++++++++++++++----
 1 file changed, 78 insertions(+), 14 deletions(-)

diff --git a/drivers/staging/r8188eu/hal/usb_ops_linux.c b/drivers/staging/r8188eu/hal/usb_ops_linux.c
index a87b0d2e87d0..f9c4fd5a2c53 100644
--- a/drivers/staging/r8188eu/hal/usb_ops_linux.c
+++ b/drivers/staging/r8188eu/hal/usb_ops_linux.c
@@ -97,38 +97,102 @@ static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u16 value, void *pdata,
 	return status;
 }
 
+static int usb_read(struct intf_hdl *intfhdl, u32 addr, void *data, u8 size)
+{
+	u16 value = (u16)(addr & 0x0000ffff);
+	struct adapter *adapt = intfhdl->padapter;
+	struct dvobj_priv *dvobjpriv = adapter_to_dvobj(adapt);
+	struct usb_device *udev = dvobjpriv->pusbdev;
+	int status;
+	u8 *io_buf;
+	int vendorreq_times = 0;
+
+	if (adapt->bSurpriseRemoved || adapt->pwrctrlpriv.pnp_bstop_trx) {
+		status = -EPERM;
+		goto exit;
+	}
+
+	mutex_lock(&dvobjpriv->usb_vendor_req_mutex);
+
+	/*  Acquire IO memory for vendorreq */
+	io_buf = dvobjpriv->usb_vendor_req_buf;
+
+	if (!io_buf) {
+		DBG_88E("[%s] io_buf == NULL\n", __func__);
+		status = -ENOMEM;
+		goto release_mutex;
+	}
+
+	while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
+		status = usb_control_msg_recv(udev, 0, REALTEK_USB_VENQT_CMD_REQ,
+					      REALTEK_USB_VENQT_READ, value,
+					      REALTEK_USB_VENQT_CMD_IDX, io_buf,
+					      size, RTW_USB_CONTROL_MSG_TIMEOUT,
+					      GFP_KERNEL);
+		if (!status) {   /*  Success this control transfer. */
+			rtw_reset_continual_urb_error(dvobjpriv);
+			memcpy(data, io_buf, size);
+		} else { /*  error cases */
+			DBG_88E("reg 0x%x, usb %s %u fail, status:%d vendorreq_times:%d\n",
+				value, "read", size, status, vendorreq_times);
+
+			if (status == (-ESHUTDOWN) || status == -ENODEV) {
+				adapt->bSurpriseRemoved = true;
+			} else {
+				struct hal_data_8188e *haldata = GET_HAL_DATA(adapt);
+
+				haldata->srestpriv.wifi_error_status = USB_VEN_REQ_CMD_FAIL;
+			}
+
+			if (rtw_inc_and_chk_continual_urb_error(dvobjpriv)) {
+				adapt->bSurpriseRemoved = true;
+				break;
+			}
+		}
+
+		/*  firmware download is checksummed, don't retry */
+		if ((value >= FW_8188E_START_ADDRESS && value <= FW_8188E_END_ADDRESS) || !status)
+			break;
+	}
+
+release_mutex:
+	mutex_unlock(&dvobjpriv->usb_vendor_req_mutex);
+exit:
+	return status;
+}
+
 u8 rtw_read8(struct adapter *adapter, u32 addr)
 {
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-	u16 wvalue = (u16)(addr & 0x0000ffff);
+	struct io_priv *io_priv = &adapter->iopriv;
+	struct intf_hdl *intfhdl = &io_priv->intf;
+	u16 value = (u16)(addr & 0x0000ffff);
 	u8 data;
 
-	usbctrl_vendorreq(pintfhdl, wvalue, &data, 1, REALTEK_USB_VENQT_READ);
+	usb_read(intfhdl, value, &data, 1);
 
 	return data;
 }
 
 u16 rtw_read16(struct adapter *adapter, u32 addr)
 {
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-	u16 wvalue = (u16)(addr & 0x0000ffff);
-	__le32 data;
+	struct io_priv *io_priv = &adapter->iopriv;
+	struct intf_hdl *intfhdl = &io_priv->intf;
+	u16 value = (u16)(addr & 0x0000ffff);
+	__le16 data;
 
-	usbctrl_vendorreq(pintfhdl, wvalue, &data, 2, REALTEK_USB_VENQT_READ);
+	usb_read(intfhdl, value, &data, 2);
 
-	return (u16)(le32_to_cpu(data) & 0xffff);
+	return le16_to_cpu(data);
 }
 
 u32 rtw_read32(struct adapter *adapter, u32 addr)
 {
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-	u16 wvalue = (u16)(addr & 0x0000ffff);
+	struct io_priv *io_priv = &adapter->iopriv;
+	struct intf_hdl *intfhdl = &io_priv->intf;
+	u16 value = (u16)(addr & 0x0000ffff);
 	__le32 data;
 
-	usbctrl_vendorreq(pintfhdl, wvalue, &data, 4, REALTEK_USB_VENQT_READ);
+	usb_read(intfhdl, value, &data, 4);
 
 	return le32_to_cpu(data);
 }
-- 
2.33.0

[PATCH 3/3] staging: r8188eu: Shorten calls chain of rtw_write8/16/32/N()

[Fabio M. De Francesco]

Shorten the calls chain of rtw_write8/16/32() down to the actual writes.
For this purpose unify the four usb_write8/16/32/N() into the new
usb_write(); make the latter parameterizable with 'size'; embed most of
the code of usbctrl_vendorreq() into usb_write() and use in it the new
usb_control_msg_send() API of USB Core.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
---

v1->v2: Replace parameter REALTEK_USB_VENQT_READ with REALTEK_USB_VENQT_WRITE
in usb_control_msg_send(). More in-depth explanation at
https://lore.kernel.org/lkml/2791328.7pjKATJfGa@localhost.localdomain/T/#m1fc1ab2f7c1f463049ad88d5df5bb1b107b37260

 drivers/staging/r8188eu/hal/usb_ops_linux.c | 130 ++++++++------------
 1 file changed, 53 insertions(+), 77 deletions(-)

diff --git a/drivers/staging/r8188eu/hal/usb_ops_linux.c b/drivers/staging/r8188eu/hal/usb_ops_linux.c
index f9c4fd5a2c53..e31d1b1fdb12 100644
--- a/drivers/staging/r8188eu/hal/usb_ops_linux.c
+++ b/drivers/staging/r8188eu/hal/usb_ops_linux.c
@@ -8,76 +8,51 @@
 #include "../include/recv_osdep.h"
 #include "../include/rtl8188e_hal.h"
 
-static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u16 value, void *pdata, u16 len, u8 requesttype)
+static int usb_read(struct intf_hdl *intfhdl, u32 addr, void *data, u8 size)
 {
-	struct adapter	*adapt = pintfhdl->padapter;
-	struct dvobj_priv  *dvobjpriv = adapter_to_dvobj(adapt);
+	u16 value = (u16)(addr & 0x0000ffff);
+	struct adapter *adapt = intfhdl->padapter;
+	struct dvobj_priv *dvobjpriv = adapter_to_dvobj(adapt);
 	struct usb_device *udev = dvobjpriv->pusbdev;
-	unsigned int pipe;
-	int status = 0;
-	u8 *pIo_buf;
+	int status;
+	u8 *io_buf;
 	int vendorreq_times = 0;
 
-	if ((adapt->bSurpriseRemoved) || (adapt->pwrctrlpriv.pnp_bstop_trx)) {
+	if (adapt->bSurpriseRemoved || adapt->pwrctrlpriv.pnp_bstop_trx) {
 		status = -EPERM;
 		goto exit;
 	}
 
-	if (len > MAX_VENDOR_REQ_CMD_SIZE) {
-		DBG_88E("[%s] Buffer len error ,vendor request failed\n", __func__);
-		status = -EINVAL;
-		goto exit;
-	}
-
-	_enter_critical_mutex(&dvobjpriv->usb_vendor_req_mutex, NULL);
+	mutex_lock(&dvobjpriv->usb_vendor_req_mutex);
 
 	/*  Acquire IO memory for vendorreq */
-	pIo_buf = dvobjpriv->usb_vendor_req_buf;
+	io_buf = dvobjpriv->usb_vendor_req_buf;
 
-	if (!pIo_buf) {
-		DBG_88E("[%s] pIo_buf == NULL\n", __func__);
+	if (!io_buf) {
+		DBG_88E("[%s] io_buf == NULL\n", __func__);
 		status = -ENOMEM;
 		goto release_mutex;
 	}
 
-	if (requesttype == REALTEK_USB_VENQT_READ)
-		pipe = usb_rcvctrlpipe(udev, 0);/* read_in */
-	else
-		pipe = usb_sndctrlpipe(udev, 0);/* write_out */
-
 	while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
-		if (requesttype == REALTEK_USB_VENQT_READ)
-			memset(pIo_buf, 0, len);
-		else
-			memcpy(pIo_buf, pdata, len);
-
-		status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ,
-					 requesttype, value, REALTEK_USB_VENQT_CMD_IDX,
-					 pIo_buf, len, RTW_USB_CONTROL_MSG_TIMEOUT);
-
-		if (status == len) {   /*  Success this control transfer. */
+		status = usb_control_msg_recv(udev, 0, REALTEK_USB_VENQT_CMD_REQ,
+					      REALTEK_USB_VENQT_READ, value,
+					      REALTEK_USB_VENQT_CMD_IDX, io_buf,
+					      size, RTW_USB_CONTROL_MSG_TIMEOUT,
+					      GFP_KERNEL);
+		if (!status) {   /*  Success this control transfer. */
 			rtw_reset_continual_urb_error(dvobjpriv);
-			if (requesttype == REALTEK_USB_VENQT_READ)
-				memcpy(pdata, pIo_buf,  len);
+			memcpy(data, io_buf, size);
 		} else { /*  error cases */
-			DBG_88E("reg 0x%x, usb %s %u fail, status:%d value=0x%x, vendorreq_times:%d\n",
-				value, (requesttype == REALTEK_USB_VENQT_READ) ? "read" : "write",
-				len, status, *(u32 *)pdata, vendorreq_times);
-
-			if (status < 0) {
-				if (status == (-ESHUTDOWN) || status == -ENODEV) {
-					adapt->bSurpriseRemoved = true;
-				} else {
-					struct hal_data_8188e	*haldata = GET_HAL_DATA(adapt);
-					haldata->srestpriv.wifi_error_status = USB_VEN_REQ_CMD_FAIL;
-				}
-			} else { /*  status != len && status >= 0 */
-				if (status > 0) {
-					if (requesttype == REALTEK_USB_VENQT_READ) {
-						/*  For Control read transfer, we have to copy the read data from pIo_buf to pdata. */
-						memcpy(pdata, pIo_buf,  len);
-					}
-				}
+			DBG_88E("reg 0x%x, usb %s %u fail, status:%d vendorreq_times:%d\n",
+				value, "read", size, status, vendorreq_times);
+
+			if (status == (-ESHUTDOWN) || status == -ENODEV) {
+				adapt->bSurpriseRemoved = true;
+			} else {
+				struct hal_data_8188e *haldata = GET_HAL_DATA(adapt);
+
+				haldata->srestpriv.wifi_error_status = USB_VEN_REQ_CMD_FAIL;
 			}
 
 			if (rtw_inc_and_chk_continual_urb_error(dvobjpriv)) {
@@ -87,17 +62,18 @@ static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u16 value, void *pdata,
 
 		}
 
-		/*  firmware download is checksumed, don't retry */
-		if ((value >= FW_8188E_START_ADDRESS && value <= FW_8188E_END_ADDRESS) || status == len)
+		/*  firmware download is checksummed, don't retry */
+		if ((value >= FW_8188E_START_ADDRESS && value <= FW_8188E_END_ADDRESS) || !status)
 			break;
 	}
+
 release_mutex:
-	_exit_critical_mutex(&dvobjpriv->usb_vendor_req_mutex, NULL);
+	mutex_unlock(&dvobjpriv->usb_vendor_req_mutex);
 exit:
 	return status;
 }
 
-static int usb_read(struct intf_hdl *intfhdl, u32 addr, void *data, u8 size)
+static int usb_write(struct intf_hdl *intfhdl, u32 addr, void *data, u8 size)
 {
 	u16 value = (u16)(addr & 0x0000ffff);
 	struct adapter *adapt = intfhdl->padapter;
@@ -123,15 +99,15 @@ static int usb_read(struct intf_hdl *intfhdl, u32 addr, void *data, u8 size)
 		goto release_mutex;
 	}
 
+	memcpy(io_buf, data, size);
 	while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
-		status = usb_control_msg_recv(udev, 0, REALTEK_USB_VENQT_CMD_REQ,
-					      REALTEK_USB_VENQT_READ, value,
+		status = usb_control_msg_send(udev, 0, REALTEK_USB_VENQT_CMD_REQ,
+					      REALTEK_USB_VENQT_WRITE, value,
 					      REALTEK_USB_VENQT_CMD_IDX, io_buf,
 					      size, RTW_USB_CONTROL_MSG_TIMEOUT,
 					      GFP_KERNEL);
 		if (!status) {   /*  Success this control transfer. */
 			rtw_reset_continual_urb_error(dvobjpriv);
-			memcpy(data, io_buf, size);
 		} else { /*  error cases */
 			DBG_88E("reg 0x%x, usb %s %u fail, status:%d vendorreq_times:%d\n",
 				value, "read", size, status, vendorreq_times);
@@ -199,55 +175,55 @@ u32 rtw_read32(struct adapter *adapter, u32 addr)
 
 int rtw_write8(struct adapter *adapter, u32 addr, u8 val)
 {
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-	u16 wvalue = (u16)(addr & 0x0000ffff);
+	struct io_priv *io_priv = &adapter->iopriv;
+	struct intf_hdl *intfhdl = &io_priv->intf;
+	u16 value = (u16)(addr & 0x0000ffff);
 	int ret;
 
-	ret = usbctrl_vendorreq(pintfhdl, wvalue, &val, 1, REALTEK_USB_VENQT_WRITE);
+	ret = usb_write(intfhdl, value, &val, 1);
 
 	return RTW_STATUS_CODE(ret);
 }
 
 int rtw_write16(struct adapter *adapter, u32 addr, u16 val)
 {
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-	u16 wvalue = (u16)(addr & 0x0000ffff);
+	struct io_priv *io_priv = &adapter->iopriv;
+	struct intf_hdl *intfhdl = &io_priv->intf;
+	u16 value = (u16)(addr & 0x0000ffff);
 	__le32 data = cpu_to_le32(val & 0x0000ffff);
 	int ret;
 
-	ret = usbctrl_vendorreq(pintfhdl, wvalue, &data, 2, REALTEK_USB_VENQT_WRITE);
+	ret = usb_write(intfhdl, value, &data, 2);
 
 	return RTW_STATUS_CODE(ret);
 }
 
 int rtw_write32(struct adapter *adapter, u32 addr, u32 val)
 {
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-	u16 wvalue = (u16)(addr & 0x0000ffff);
+	struct io_priv *io_priv = &adapter->iopriv;
+	struct intf_hdl *intfhdl = &io_priv->intf;
+	u16 value = (u16)(addr & 0x0000ffff);
 	__le32 data = cpu_to_le32(val);
 	int ret;
 
-	ret = usbctrl_vendorreq(pintfhdl, wvalue, &data, 4, REALTEK_USB_VENQT_WRITE);
+	ret = usb_write(intfhdl, value, &data, 4);
 
 	return RTW_STATUS_CODE(ret);
 }
 
-int rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *pdata)
+int rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *data)
 {
-	struct io_priv *pio_priv = &adapter->iopriv;
-	struct intf_hdl *pintfhdl = &pio_priv->intf;
-	u16 wvalue = (u16)(addr & 0x0000ffff);
+	struct io_priv *io_priv = &adapter->iopriv;
+	struct intf_hdl *intfhdl = &io_priv->intf;
+	u16 value = (u16)(addr & 0x0000ffff);
 	u8 buf[VENDOR_CMD_MAX_DATA_LEN] = {0};
 	int ret;
 
 	if (length > VENDOR_CMD_MAX_DATA_LEN)
 		return -EINVAL;
 
-	memcpy(buf, pdata, length);
-	ret = usbctrl_vendorreq(pintfhdl, wvalue, buf, (length & 0xffff), REALTEK_USB_VENQT_WRITE);
+	memcpy(buf, data, length);
+	ret = usb_write(intfhdl, value, buf, (length & 0xffff));
 
 	return RTW_STATUS_CODE(ret);
 }
-- 
2.33.0

Re: [PATCH v2 0/3] staging: r8188eu: Shorten and simplify calls chain

[Fabio M. De Francesco]

On Saturday, September 4, 2021 11:27:16 PM CEST Fabio M. De Francesco wrote:
> io_ops abstraction is useless in this driver, since there is only one ops
> registration. Without io_ops we can get rid of indirect calls mess and
> shorten the calls chain.
> 
> Shorten the calls chain of rtw_read8/16/32() down to the actual reads.
> For this purpose unify the three usb_read8/16/32 into the new
> usb_read(); make the latter parametrizable with 'size'; embed most of
> the code of usbctrl_vendorreq() into usb_read() and use in it the new
> usb_control_msg_recv() API of USB Core.
> 
> Shorten the calls chain of rtw_write8/16/32() down to the actual writes.
> For this purpose unify the four usb_write8/16/32/N() into the new
> usb_write(); make the latter parametrizable with 'size'; embed most of
> the code of usbctrl_vendorreq() into usb_write() and use in it the new
> usb_control_msg_send() API of USB Core.
> 
> The code with the modifications was thoroughly tested by Pavel Skripkin 
> using a TP-Link TL-WN722N v2 / v3 [Realtek RTL8188EUS]
> 
> Fabio M. De Francesco (2):
>   staging: r8188eu: Shorten calls chain of rtw_read8/16/32()
>   staging: r8188eu: Shorten calls chain of rtw_write8/16/32/N()
> 
> Pavel Skripkin (1):
>   staging: r8188eu: remove _io_ops structure
> 
>  drivers/staging/r8188eu/core/rtw_io.c         | 241 +----------------
>  drivers/staging/r8188eu/hal/usb_halinit.c     |   6 +-
>  drivers/staging/r8188eu/hal/usb_ops_linux.c   | 242 +++++++++++-------
>  drivers/staging/r8188eu/include/rtw_io.h      |  76 +-----
>  drivers/staging/r8188eu/include/usb_ops.h     |   2 -
>  .../staging/r8188eu/include/usb_ops_linux.h   |   8 -
>  drivers/staging/r8188eu/os_dep/usb_intf.c     |   2 +-
>  .../staging/r8188eu/os_dep/usb_ops_linux.c    |  40 +--
>  8 files changed, 174 insertions(+), 443 deletions(-)
> 
> -- 
> 2.33.0
> 
Dear Maintainers,

Stupid mistakes on mistakes... Please discard this revision of the series 
because patch 3/3 is missing the version number.

Thanks,

Fabio