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path: root/drivers/usb/class/usbtmc.c
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Diffstat (limited to 'drivers/usb/class/usbtmc.c')
-rw-r--r--drivers/usb/class/usbtmc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 4bb6d304eb4b..311007b1d904 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -1928,6 +1928,8 @@ static int usbtmc_ioctl_request(struct usbtmc_device_data *data,
if (request.req.wLength > USBTMC_BUFSIZE)
return -EMSGSIZE;
+ if (request.req.wLength == 0) /* Length-0 requests are never IN */
+ request.req.bRequestType &= ~USB_DIR_IN;
is_in = request.req.bRequestType & USB_DIR_IN;