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List: linux-can
Subject: [PATCH] can/peak_usb: fix memset() usage
From: Stephane Grosjean <s.grosjean () peak-system ! com>
Date: 2014-11-28 13:08:48
Message-ID: 1417180128-28509-1-git-send-email-s.grosjean () peak-system ! com
[Download RAW message or body]
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>
---
drivers/net/can/usb/peak_usb/pcan_usb_pro.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
index 263dd92..f7f796a 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
@@ -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;
}
--
1.9.1
--
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