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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Guido Kiener <guido@kiener-muenchen.de>,
	Guido Kiener <guido.kiener@rohde-schwarz.com>,
	Steve Bayless <steve_bayless@keysight.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Sasha Levin <sashal@kernel.org>,
	linux-usb@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 054/191] usb: usbtmc: Fix ioctl USBTMC_IOCTL_ABORT_BULK_OUT
Date: Sat,  9 Nov 2019 21:37:56 -0500
Message-ID: <20191110024013.29782-54-sashal@kernel.org> (raw)
In-Reply-To: <20191110024013.29782-1-sashal@kernel.org>

From: Guido Kiener <guido@kiener-muenchen.de>

[ Upstream commit 0e59088e7ff7aeda49dedadbf0e967761b909ad8 ]

Add parameter 'tag' to function usbtmc_ioctl_abort_bulk_out_tag()
for future versions.

Use USBTMC_BUFSIZE (4k) instead of USBTMC_SIZE_IOBUFFER (2k).
Using USBTMC_SIZE_IOBUFFER is deprecated.

Insert a sleep of 50 ms between subsequent
CHECK_ABORT_BULK_OUT_STATUS control requests to avoid stressing
the instrument with repeated requests.

Use common macro USB_CTRL_GET_TIMEOUT instead of USBTMC_TIMEOUT.

Signed-off-by: Guido Kiener <guido.kiener@rohde-schwarz.com>
Reviewed-by: Steve Bayless <steve_bayless@keysight.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/class/usbtmc.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 83ffa5a14c3db..3ce45c9e9d20d 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -342,7 +342,8 @@ static int usbtmc_ioctl_abort_bulk_in(struct usbtmc_device_data *data)
 
 }
 
-static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data)
+static int usbtmc_ioctl_abort_bulk_out_tag(struct usbtmc_device_data *data,
+					   u8 tag)
 {
 	struct device *dev;
 	u8 *buffer;
@@ -359,8 +360,8 @@ static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data)
 			     usb_rcvctrlpipe(data->usb_dev, 0),
 			     USBTMC_REQUEST_INITIATE_ABORT_BULK_OUT,
 			     USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
-			     data->bTag_last_write, data->bulk_out,
-			     buffer, 2, USBTMC_TIMEOUT);
+			     tag, data->bulk_out,
+			     buffer, 2, USB_CTRL_GET_TIMEOUT);
 
 	if (rv < 0) {
 		dev_err(dev, "usb_control_msg returned %d\n", rv);
@@ -379,12 +380,14 @@ static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data)
 	n = 0;
 
 usbtmc_abort_bulk_out_check_status:
+	/* do not stress device with subsequent requests */
+	msleep(50);
 	rv = usb_control_msg(data->usb_dev,
 			     usb_rcvctrlpipe(data->usb_dev, 0),
 			     USBTMC_REQUEST_CHECK_ABORT_BULK_OUT_STATUS,
 			     USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
 			     0, data->bulk_out, buffer, 0x08,
-			     USBTMC_TIMEOUT);
+			     USB_CTRL_GET_TIMEOUT);
 	n++;
 	if (rv < 0) {
 		dev_err(dev, "usb_control_msg returned %d\n", rv);
@@ -418,6 +421,11 @@ static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data)
 	return rv;
 }
 
+static int usbtmc_ioctl_abort_bulk_out(struct usbtmc_device_data *data)
+{
+	return usbtmc_ioctl_abort_bulk_out_tag(data, data->bTag_last_write);
+}
+
 static int usbtmc488_ioctl_read_stb(struct usbtmc_file_data *file_data,
 				void __user *arg)
 {
-- 
2.20.1


  parent reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20191110024013.29782-1-sashal@kernel.org>
2019-11-10  2:37 ` [PATCH AUTOSEL 4.19 052/191] usb: chipidea: imx: enable OTG overcurrent in case USB subsystem is already started Sasha Levin
2019-11-10  2:37 ` [PATCH AUTOSEL 4.19 053/191] usb: chipidea: Fix otg event handler Sasha Levin
2019-11-10  2:37 ` Sasha Levin [this message]
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 097/191] usb: gadget: uvc: configfs: Drop leaked references to config items Sasha Levin
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 098/191] usb: gadget: uvc: configfs: Prevent format changes after linking header Sasha Levin
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 099/191] usb: gadget: uvc: configfs: Sort frame intervals upon writing Sasha Levin
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 108/191] usb: gadget: uvc: Factor out video USB request queueing Sasha Levin
2019-11-10  2:38 ` [PATCH AUTOSEL 4.19 109/191] usb: gadget: uvc: Only halt video streaming endpoint in bulk mode Sasha Levin
2019-11-10  2:40 ` [PATCH AUTOSEL 4.19 184/191] usb: xhci-mtk: fix ISOC error when interval is zero Sasha Levin
2019-11-10  2:40 ` [PATCH AUTOSEL 4.19 185/191] usb: usbtmc: uninitialized symbol 'actual' in usbtmc_ioctl_clear Sasha Levin

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