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 @@ exit:
}
-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 @@ exit: 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) {