V4L/DVB (11778): Siano: smsusb - lost buffers bug fix

This patch fixes a problem were protocol buffers
have been lost during USB disconnect events.

Signed-off-by: Uri Shkolnik <uris@siano-ms.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/media/dvb/siano/smsusb.c b/drivers/media/dvb/siano/smsusb.c
index 1bcd0eff4b16..4fa38bd83887 100644
--- a/drivers/media/dvb/siano/smsusb.c
+++ b/drivers/media/dvb/siano/smsusb.c
@@ -65,14 +65,14 @@ static void smsusb_onresponse(struct urb *urb)
         struct smsusb_urb_t *surb = (struct smsusb_urb_t *) urb->context;
         struct smsusb_device_t *dev = surb->dev;
 
-        if (urb->status < 0) {
-                sms_err("error, urb status %d, %d bytes",
+        if (urb->status == -ESHUTDOWN) {
+                sms_err("error, urb status %d (-ESHUTDOWN), %d bytes",
                         urb->status, urb->actual_length);
                 return;
         }
 
-        if (urb->actual_length > 0) {
-                struct SmsMsgHdr_ST *phdr = (struct SmsMsgHdr_ST *) surb->cb->p;
+        if ((urb->actual_length > 0) && (urb->status == 0)) {
+                struct SmsMsgHdr_ST *phdr = (struct SmsMsgHdr_ST *)surb->cb->p;
 
                 smsendian_handle_message_header(phdr);
                 if (urb->actual_length >= phdr->msgLength) {
@@ -111,7 +111,10 @@ static void smsusb_onresponse(struct urb *urb)
                                 "msglen %d actual %d",
                                 phdr->msgLength, urb->actual_length);
                 }
-        }
+        } else
+                sms_err("error, urb status %d, %d bytes",
+                        urb->status, urb->actual_length);
+
 
 exit_and_resubmit:
         smsusb_submit_urb(dev, surb);