diff options
| author | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2013-12-28 18:47:16 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-01-10 12:00:25 +0400 |
| commit | 46c704d77f785974ce095b6cf0c71b92d1b06706 (patch) | |
| tree | f9223fc9a4ec37674dbb77e3d8175f0b5617a2cb /drivers/media/usb/em28xx | |
| parent | dad4c41827c71a84c8455e19431278e8c1edf118 (diff) | |
| download | linux-46c704d77f785974ce095b6cf0c71b92d1b06706.tar.xz | |
[media] em28xx: use usb_alloc_coherent() for audio
Instead of allocating transfer buffers with kmalloc() use
usb_alloc_coherent().
This patch should make it work also with ARM CPUs.
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/usb/em28xx')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-audio.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-audio.c b/drivers/media/usb/em28xx/em28xx-audio.c index a6eef06ffdcd..e5120430ec80 100644 --- a/drivers/media/usb/em28xx/em28xx-audio.c +++ b/drivers/media/usb/em28xx/em28xx-audio.c @@ -64,16 +64,22 @@ static int em28xx_deinit_isoc_audio(struct em28xx *dev) dprintk("Stopping isoc\n"); for (i = 0; i < EM28XX_AUDIO_BUFS; i++) { + struct urb *urb = dev->adev.urb[i]; + if (!irqs_disabled()) - usb_kill_urb(dev->adev.urb[i]); + usb_kill_urb(urb); else - usb_unlink_urb(dev->adev.urb[i]); + usb_unlink_urb(urb); - usb_free_urb(dev->adev.urb[i]); - dev->adev.urb[i] = NULL; + usb_free_coherent(dev->udev, + urb->transfer_buffer_length, + dev->adev.transfer_buffer[i], + urb->transfer_dma); - kfree(dev->adev.transfer_buffer[i]); dev->adev.transfer_buffer[i] = NULL; + + usb_free_urb(urb); + dev->adev.urb[i] = NULL; } return 0; @@ -176,12 +182,8 @@ static int em28xx_init_audio_isoc(struct em28xx *dev) for (i = 0; i < EM28XX_AUDIO_BUFS; i++) { struct urb *urb; int j, k; + void *buf; - dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC); - if (!dev->adev.transfer_buffer[i]) - return -ENOMEM; - - memset(dev->adev.transfer_buffer[i], 0x80, sb_size); urb = usb_alloc_urb(EM28XX_NUM_AUDIO_PACKETS, GFP_ATOMIC); if (!urb) { em28xx_errdev("usb_alloc_urb failed!\n"); @@ -192,10 +194,17 @@ static int em28xx_init_audio_isoc(struct em28xx *dev) return -ENOMEM; } + buf = usb_alloc_coherent(dev->udev, sb_size, GFP_ATOMIC, + &urb->transfer_dma); + if (!buf) + return -ENOMEM; + dev->adev.transfer_buffer[i] = buf; + memset(buf, 0x80, sb_size); + urb->dev = dev->udev; urb->context = dev; urb->pipe = usb_rcvisocpipe(dev->udev, EM28XX_EP_AUDIO); - urb->transfer_flags = URB_ISO_ASAP; + urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; urb->transfer_buffer = dev->adev.transfer_buffer[i]; urb->interval = 1; urb->complete = em28xx_audio_isocirq; |