From: Oliver Neukum <oneukum@suse.com>
To: himadrispandya@gmail.com, gregKH@linuxfoundation.org,
stern@rowland.harvard.edu, linux-usb@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jaroslav Kysela <perex@perex.cz>,
Vasily Khoruzhick <anarsoul@gmail.com>
Subject: [RFC 12/14] sound: line6: move to use usb_control_msg_send() and usb_control_msg_recv()
Date: Wed, 23 Sep 2020 15:43:46 +0200 [thread overview]
Message-ID: <20200923134348.23862-13-oneukum@suse.com> (raw)
In-Reply-To: <20200923134348.23862-1-oneukum@suse.com>
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The usb_control_msg_send() and usb_control_msg_recv() calls can return
an error if a "short" write/read happens, and they can handle data off
of the stack, so move the driver over to using those calls instead,
saving some logic when dynamically allocating memory.
v2: API change of use usb_control_msg_send() and usb_control_msg_recv()
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Vasily Khoruzhick <anarsoul@gmail.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200914153756.3412156-9-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/line6/driver.c | 72 +++++++++++++++++++---------------------------
sound/usb/line6/podhd.c | 23 ++++++---------
sound/usb/line6/toneport.c | 9 +++---
3 files changed, 44 insertions(+), 60 deletions(-)
diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c
index 60674ce4879b..a030dd65eb28 100644
--- a/sound/usb/line6/driver.c
+++ b/sound/usb/line6/driver.c
@@ -337,23 +337,18 @@ int line6_read_data(struct usb_line6 *line6, unsigned address, void *data,
{
struct usb_device *usbdev = line6->usbdev;
int ret;
- unsigned char *len;
+ u8 len;
unsigned count;
if (address > 0xffff || datalen > 0xff)
return -EINVAL;
- len = kmalloc(1, GFP_KERNEL);
- if (!len)
- return -ENOMEM;
-
/* query the serial number: */
- ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
- (datalen << 8) | 0x21, address,
- NULL, 0, LINE6_TIMEOUT * HZ);
-
- if (ret < 0) {
+ ret = usb_control_msg_send(usbdev, 0, 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ (datalen << 8) | 0x21, address, NULL, 0,
+ LINE6_TIMEOUT * HZ, GFP_KERNEL);
+ if (ret) {
dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
goto exit;
}
@@ -362,45 +357,42 @@ int line6_read_data(struct usb_line6 *line6, unsigned address, void *data,
for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
mdelay(LINE6_READ_WRITE_STATUS_DELAY);
- ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE |
- USB_DIR_IN,
- 0x0012, 0x0000, len, 1,
- LINE6_TIMEOUT * HZ);
- if (ret < 0) {
+ ret = usb_control_msg_recv(usbdev, 0, 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x0012, 0x0000, &len, 1,
+ LINE6_TIMEOUT * HZ, GFP_KERNEL);
+ if (ret) {
dev_err(line6->ifcdev,
"receive length failed (error %d)\n", ret);
goto exit;
}
- if (*len != 0xff)
+ if (len != 0xff)
break;
}
ret = -EIO;
- if (*len == 0xff) {
+ if (len == 0xff) {
dev_err(line6->ifcdev, "read failed after %d retries\n",
count);
goto exit;
- } else if (*len != datalen) {
+ } else if (len != datalen) {
/* should be equal or something went wrong */
dev_err(line6->ifcdev,
"length mismatch (expected %d, got %d)\n",
- (int)datalen, (int)*len);
+ (int)datalen, len);
goto exit;
}
/* receive the result: */
- ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0x0013, 0x0000, data, datalen,
- LINE6_TIMEOUT * HZ);
-
- if (ret < 0)
+ ret = usb_control_msg_recv(usbdev, 0, 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x0013, 0x0000, data, datalen, LINE6_TIMEOUT * HZ,
+ GFP_KERNEL);
+ if (ret)
dev_err(line6->ifcdev, "read failed (error %d)\n", ret);
exit:
- kfree(len);
return ret;
}
EXPORT_SYMBOL_GPL(line6_read_data);
@@ -423,12 +415,11 @@ int line6_write_data(struct usb_line6 *line6, unsigned address, void *data,
if (!status)
return -ENOMEM;
- ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
- 0x0022, address, data, datalen,
- LINE6_TIMEOUT * HZ);
-
- if (ret < 0) {
+ ret = usb_control_msg_send(usbdev, 0, 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ 0x0022, address, data, datalen, LINE6_TIMEOUT * HZ,
+ GFP_KERNEL);
+ if (ret) {
dev_err(line6->ifcdev,
"write request failed (error %d)\n", ret);
goto exit;
@@ -437,14 +428,11 @@ int line6_write_data(struct usb_line6 *line6, unsigned address, void *data,
for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
mdelay(LINE6_READ_WRITE_STATUS_DELAY);
- ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
- 0x67,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE |
- USB_DIR_IN,
- 0x0012, 0x0000,
- status, 1, LINE6_TIMEOUT * HZ);
-
- if (ret < 0) {
+ ret = usb_control_msg_recv(usbdev, 0, 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x0012, 0x0000, status, 1, LINE6_TIMEOUT * HZ,
+ GFP_KERNEL);
+ if (ret) {
dev_err(line6->ifcdev,
"receiving status failed (error %d)\n", ret);
goto exit;
diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c
index eef45f7fef0d..28794a35949d 100644
--- a/sound/usb/line6/podhd.c
+++ b/sound/usb/line6/podhd.c
@@ -183,29 +183,25 @@ static const struct attribute_group podhd_dev_attr_group = {
static int podhd_dev_start(struct usb_line6_podhd *pod)
{
int ret;
- u8 *init_bytes;
+ u8 init_bytes[8];
int i;
struct usb_device *usbdev = pod->line6.usbdev;
- init_bytes = kmalloc(8, GFP_KERNEL);
- if (!init_bytes)
- return -ENOMEM;
-
- ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
+ ret = usb_control_msg_send(usbdev, 0,
0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0x11, 0,
- NULL, 0, LINE6_TIMEOUT * HZ);
- if (ret < 0) {
+ NULL, 0, LINE6_TIMEOUT * HZ, GFP_KERNEL);
+ if (ret) {
dev_err(pod->line6.ifcdev, "read request failed (error %d)\n", ret);
goto exit;
}
/* NOTE: looks like some kind of ping message */
- ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
+ ret = usb_control_msg_recv(usbdev, 0, 0x67,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
0x11, 0x0,
- init_bytes, 3, LINE6_TIMEOUT * HZ);
- if (ret < 0) {
+ init_bytes, 3, LINE6_TIMEOUT * HZ, GFP_KERNEL);
+ if (ret) {
dev_err(pod->line6.ifcdev,
"receive length failed (error %d)\n", ret);
goto exit;
@@ -220,13 +216,12 @@ static int podhd_dev_start(struct usb_line6_podhd *pod)
goto exit;
}
- ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
+ ret = usb_control_msg_send(usbdev, 0,
USB_REQ_SET_FEATURE,
USB_TYPE_STANDARD | USB_RECIP_DEVICE | USB_DIR_OUT,
1, 0,
- NULL, 0, LINE6_TIMEOUT * HZ);
+ NULL, 0, LINE6_TIMEOUT * HZ, GFP_KERNEL);
exit:
- kfree(init_bytes);
return ret;
}
diff --git a/sound/usb/line6/toneport.c b/sound/usb/line6/toneport.c
index 94dd5e7ab2e6..4e5693c97aa4 100644
--- a/sound/usb/line6/toneport.c
+++ b/sound/usb/line6/toneport.c
@@ -126,11 +126,12 @@ static int toneport_send_cmd(struct usb_device *usbdev, int cmd1, int cmd2)
{
int ret;
- ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
- cmd1, cmd2, NULL, 0, LINE6_TIMEOUT * HZ);
+ ret = usb_control_msg_send(usbdev, 0, 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ cmd1, cmd2, NULL, 0, LINE6_TIMEOUT * HZ,
+ GFP_KERNEL);
- if (ret < 0) {
+ if (ret) {
dev_err(&usbdev->dev, "send failed (error %d)\n", ret);
return ret;
}
--
2.16.4
next prev parent reply other threads:[~2020-09-23 13:44 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-23 13:43 [RFC] change the new message to provide for memory allocations Oliver Neukum
2020-09-23 13:43 ` [RFC 01/14] Revert "USB: core: hub.c: use usb_control_msg_send() in a few places" Oliver Neukum
2020-09-23 13:43 ` [RFC 02/14] Revert "Bluetooth: ath3k: use usb_control_msg_send() and usb_control_msg_recv()" Oliver Neukum
2020-09-23 13:43 ` [RFC 03/14] Revert "sound: hiface: move to use usb_control_msg_send()" Oliver Neukum
2020-09-23 13:43 ` [RFC 04/14] Revert "sound: line6: move to use usb_control_msg_send() and usb_control_msg_recv()" Oliver Neukum
2020-09-23 13:43 ` [RFC 05/14] Revert "sound: 6fire: " Oliver Neukum
2020-09-23 13:43 ` [RFC 06/14] Revert "sound: usx2y: move to use usb_control_msg_send()" Oliver Neukum
2020-09-23 13:43 ` [RFC 07/14] Revert "USB: legousbtower: use usb_control_msg_recv()" Oliver Neukum
2020-09-23 13:43 ` [RFC 08/14] USB: correct API of usb_control_msg_send/recv Oliver Neukum
2020-09-25 9:31 ` [PATCH 0/2] [usb] Petko Manolov
2020-09-25 9:31 ` [PATCH 1/2] net: pegasus: convert control messages to the new send/recv scheme Petko Manolov
2020-09-25 14:37 ` Greg KH
2020-09-25 16:01 ` [PATCH 0/2] [patch v2] utilize the new control message send and receive API Petko Manolov
2020-09-25 16:01 ` [PATCH 1/2] net: pegasus: convert control messages to the new send/recv scheme Petko Manolov
2020-09-26 5:44 ` Greg KH
2020-09-26 8:21 ` Petko Manolov
2020-09-26 12:45 ` Greg KH
2020-09-25 16:02 ` [PATCH 2/2] net: rtl8150: " Petko Manolov
2020-09-25 20:14 ` kernel test robot
2020-09-25 16:05 ` [PATCH 1/2] net: pegasus: " Petko Manolov
2020-09-26 5:45 ` Greg KH
2020-09-25 9:31 ` [PATCH 2/2] net: rtl8150: " Petko Manolov
2020-09-25 14:37 ` Greg KH
2020-09-26 9:13 ` [PATCH v3 0/2] Use the new usb control message API Petko Manolov
2020-09-26 9:13 ` [PATCH v3 1/2] net: pegasus: " Petko Manolov
2020-09-26 9:13 ` [PATCH v3 2/2] net: rtl8150: " Petko Manolov
2020-09-27 10:16 ` [PATCH v3 0/2] " Greg KH
2020-09-27 12:56 ` Petko Manolov
2020-09-27 12:49 ` [PATCH RESEND " Petko Manolov
2020-09-27 12:49 ` [PATCH RESEND v3 1/2] net: pegasus: " Petko Manolov
2020-09-27 12:49 ` [PATCH RESEND v3 2/2] net: rtl8150: " Petko Manolov
2020-09-28 23:00 ` [PATCH RESEND v3 0/2] " David Miller
2020-09-29 4:59 ` Petko Manolov
2020-09-29 19:58 ` David Miller
2020-09-30 6:23 ` Greg KH
2020-09-23 13:43 ` [RFC 09/14] sound: usx2y: move to use usb_control_msg_send() Oliver Neukum
2020-09-25 14:32 ` Greg KH
2020-09-23 13:43 ` [RFC 10/14] sound: 6fire: move to use usb_control_msg_send() and usb_control_msg_recv() Oliver Neukum
2020-09-23 13:43 ` [RFC 11/14] USB: legousbtower: use usb_control_msg_recv() Oliver Neukum
2020-09-23 13:43 ` Oliver Neukum [this message]
2020-09-23 13:43 ` [RFC 13/14] sound: hiface: move to use usb_control_msg_send() Oliver Neukum
2020-09-23 13:43 ` [RFC 14/14] Bluetooth: ath3k: use usb_control_msg_send() and usb_control_msg_recv() Oliver Neukum
2020-09-23 17:21 ` [RFC] change the new message to provide for memory allocations Greg KH
2020-09-23 17:32 ` Oliver Neukum
2020-09-23 17:46 ` Greg KH
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