Using usb_fill_int_urb() helps to find code which initializes an URB. A
grep for members of the struct (like ->complete) reveal lots of other
things, too.
Cc: Hans Verkuil <hverkuil@xxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
drivers/media/usb/pwc/pwc-if.c | 21 +++++++++------------
1 file changed, 9 insertions(+), 12 deletions(-)
diff --git a/drivers/media/usb/pwc/pwc-if.c b/drivers/media/usb/pwc/pwc-if.c
index 54b036d39c5b..8af72b0a607e 100644
--- a/drivers/media/usb/pwc/pwc-if.c
+++ b/drivers/media/usb/pwc/pwc-if.c
@@ -409,6 +409,8 @@ static int pwc_isoc_init(struct pwc_device *pdev)
/* Allocate and init Isochronuous urbs */
for (i = 0; i < MAX_ISO_BUFS; i++) {
+ void *buf;
+
urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
if (urb == NULL) {
pwc_isoc_cleanup(pdev);
@@ -416,23 +418,18 @@ static int pwc_isoc_init(struct pwc_device *pdev)
}
pdev->urbs[i] = urb;
PWC_DEBUG_MEMORY("Allocated URB at 0x%p\n", urb);
-
- urb->interval = 1; // devik
- urb->dev = udev;
- urb->pipe = usb_rcvisocpipe(udev, pdev->vendpoint);
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
- urb->transfer_buffer = usb_alloc_coherent(udev,
- ISO_BUFFER_SIZE,
- GFP_KERNEL,
- &urb->transfer_dma);
- if (urb->transfer_buffer == NULL) {
+ buf = usb_alloc_coherent(udev, ISO_BUFFER_SIZE, GFP_KERNEL,
+ &urb->transfer_dma);
+ if (buf == NULL) {
PWC_ERROR("Failed to allocate urb buffer %d\n", i);
pwc_isoc_cleanup(pdev);
return -ENOMEM;
}
- urb->transfer_buffer_length = ISO_BUFFER_SIZE;
- urb->complete = pwc_isoc_handler;
- urb->context = pdev;
+ usb_fill_int_urb(urb, udev,
+ usb_rcvisocpipe(udev, pdev->vendpoint),
+ buf, ISO_BUFFER_SIZE, pwc_isoc_handler, pdev, 1);
+
urb->start_frame = 0;
urb->number_of_packets = ISO_FRAMES_PER_DESC;
for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
--
2.17.1
