V4L/DVB (5720): Usbvision: fix urb allocation and submits

- fixed the urb allocation part that was not taking into account the current alternate setting
  this fixes usb_submit_urb returning -90 errno in isocIrq.
- fixed usb_submit_urb returning -1 errno in isocIrq (need to ignore usb urb with status==-ENOENT)
Acked-by: Dwaine P. Garden <dwainegarden@rogers.com>

Signed-off-by: Thierry Merle <thierry.merle@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 53 insertions, 29 deletions

diff --git a/drivers/media/video/usbvision/usbvision-core.c b/drivers/media/video/usbvision/usbvision-core.c
index 9118a6227ea..7df071eb0a3 100644
--- a/drivers/media/video/usbvision/usbvision-core.c
+++ b/drivers/media/video/usbvision/usbvision-core.c
@@ -1414,6 +1414,11 @@ static void usbvision_isocIrq(struct urb *urb)
         if (!USBVISION_IS_OPERATIONAL(usbvision))
                 return;
 
+        /* any urb with wrong status is ignored without acknowledgement */
+        if (urb->status == -ENOENT) {
+                return;
+        }
+
         f = &usbvision->curFrame;
 
         /* Manage streaming interruption */
@@ -1436,18 +1441,21 @@ static void usbvision_isocIrq(struct urb *urb)
         if (usbvision->streaming == Stream_On) {
 
                 /* If we collected enough data let's parse! */
-                if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
-                        /*If we don't have a frame we're current working on, complain */
-                        if(!list_empty(&(usbvision->inqueue))) {
-                                if (!(*f)) {
-                                        (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
-                                }
-                                usbvision_parse_data(usbvision);
-                        }
-                        else {
-                                PDEBUG(DBG_IRQ, "received data, but no one needs it");
-                                scratch_reset(usbvision);
+                if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
+                    (!list_empty(&(usbvision->inqueue))) ) {
+                        if (!(*f)) {
+                                (*f) = list_entry(usbvision->inqueue.next,
+                                                  struct usbvision_frame,
+                                                  frame);
                         }
+                        usbvision_parse_data(usbvision);
+                }
+                else {
+                        /*If we don't have a frame
+                          we're current working on, complain */
+                        PDEBUG(DBG_IRQ,
+                               "received data, but no one needs it");
+                        scratch_reset(usbvision);
                 }
         }
         else {
@@ -1466,10 +1474,10 @@ static void usbvision_isocIrq(struct urb *urb)
         urb->dev = usbvision->dev;
         errCode = usb_submit_urb (urb, GFP_ATOMIC);
 
-        /* Disable this warning.  By design of the driver. */
-        //      if(errCode) {
-        //              err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
-        //      }
+        if(errCode) {
+                err("%s: usb_submit_urb failed: error %d",
+                    __FUNCTION__, errCode);
+        }
 
         return;
 }
@@ -2394,7 +2402,7 @@ int usbvision_init_isoc(struct usb_usbvision *usbvision)
 {
         struct usb_device *dev = usbvision->dev;
         int bufIdx, errCode, regValue;
-        const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
+        int sb_size;
 
         if (!USBVISION_IS_OPERATIONAL(usbvision))
                 return -EFAULT;
@@ -2408,11 +2416,14 @@ int usbvision_init_isoc(struct usb_usbvision *usbvision)
                 usbvision->last_error = errCode;
                 return -EBUSY;
         }
+        sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
 
-        regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
+        regValue = (16 - usbvision_read_reg(usbvision,
+                                            USBVISION_ALTER_REG)) & 0x0F;
 
         usbvision->usb_bandwidth = regValue >> 1;
-        PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
+        PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
+               usbvision->usb_bandwidth);
 
 
 
@@ -2428,7 +2439,11 @@ int usbvision_init_isoc(struct usb_usbvision *usbvision)
                         return -ENOMEM;
                 }
                 usbvision->sbuf[bufIdx].urb = urb;
-                usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL,&urb->transfer_dma);
+                usbvision->sbuf[bufIdx].data =
+                        usb_buffer_alloc(usbvision->dev,
+                                         sb_size,
+                                         GFP_KERNEL,
+                                         &urb->transfer_dma);
                 urb->dev = dev;
                 urb->context = usbvision;
                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
@@ -2442,21 +2457,26 @@ int usbvision_init_isoc(struct usb_usbvision *usbvision)
                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
                      k += usbvision->isocPacketSize) {
                         urb->iso_frame_desc[j].offset = k;
-                        urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
+                        urb->iso_frame_desc[j].length =
+                                usbvision->isocPacketSize;
                 }
         }
 
 
         /* Submit all URBs */
         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
-                        errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
+                        errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
+                                                 GFP_KERNEL);
                 if (errCode) {
-                        err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
+                        err("%s: usb_submit_urb(%d) failed: error %d",
+                            __FUNCTION__, bufIdx, errCode);
                 }
         }
 
         usbvision->streaming = Stream_Idle;
-        PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
+        PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
+               __FUNCTION__,
+               usbvision->video_endp);
         return 0;
 }
 
@@ -2470,7 +2490,7 @@ int usbvision_init_isoc(struct usb_usbvision *usbvision)
 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
 {
         int bufIdx, errCode, regValue;
-        const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
+        int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
 
         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
                 return;
@@ -2499,15 +2519,19 @@ void usbvision_stop_isoc(struct usb_usbvision *usbvision)
                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
                                             usbvision->ifaceAlt);
                 if (errCode < 0) {
-                        err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
+                        err("%s: usb_set_interface() failed: error %d",
+                            __FUNCTION__, errCode);
                         usbvision->last_error = errCode;
                 }
-                regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
-                usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
-                PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
+                regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
+                usbvision->isocPacketSize =
+                        (regValue == 0) ? 0 : (regValue * 64) - 1;
+                PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
+                       usbvision->isocPacketSize);
 
                 usbvision->usb_bandwidth = regValue >> 1;
-                PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
+                PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
+                       usbvision->usb_bandwidth);
         }
 }