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can: peak_usb: fix memset() usage 

This patchs fixes a misplaced call to memset() that fills the request
buffer with 0. The problem was with sending PCAN_USBPRO_REQ_FCT
requests, the content set by the caller was thus lost.

With this patch, the memory area is zeroed only when requesting info
from the device.

Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Stephane Grosjean 2014-11-28 14:08:48 +01:00 committed by Marc Kleine-Budde
parent f2a01517f2
commit dc50ddcd4c
1 changed files with 1 additions and 2 deletions
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3
drivers/net/can/usb/peak_usb/pcan_usb_pro.c
View File

@ -333,8 +333,6 @@ static int pcan_usb_pro_send_req(struct peak_usb_device *dev, int req_id,
if (!(dev->state & PCAN_USB_STATE_CONNECTED))
return 0;
memset(req_addr, '\0', req_size);
req_type = USB_TYPE_VENDOR | USB_RECIP_OTHER;
switch (req_id) {
@ -345,6 +343,7 @@ static int pcan_usb_pro_send_req(struct peak_usb_device *dev, int req_id,
default:
p = usb_rcvctrlpipe(dev->udev, 0);
req_type |= USB_DIR_IN;
memset(req_addr, '\0', req_size);
break;
}