diff options
| author | Bhupesh Sharma <bhupesh.sharma@st.com> | 2013-03-28 13:41:53 +0400 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-04-02 12:42:49 +0400 |
| commit | 2f1d57069338b14fcf4765ae2c25fc377da45b1f (patch) | |
| tree | 3b2cbfd148a6d5766ebd3b2b0decd6346b94e929 /drivers/usb/gadget/uvc_queue.c | |
| parent | d692522577c051058efbe9e3c8aef68a4c36e4f7 (diff) | |
| download | linux-2f1d57069338b14fcf4765ae2c25fc377da45b1f.tar.xz | |
usb: gadget/uvc: Add support for 'get_unmapped_area' for MMUless architectures
This patch adds the support for 'get_unmapped_area' in UVC gadget
which is called when the 'mmap' system call is executed on MMUless
architectures.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@st.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'drivers/usb/gadget/uvc_queue.c')
| -rw-r--r-- | drivers/usb/gadget/uvc_queue.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/gadget/uvc_queue.c b/drivers/usb/gadget/uvc_queue.c index 31397954c889..7ce27e35550b 100644 --- a/drivers/usb/gadget/uvc_queue.c +++ b/drivers/usb/gadget/uvc_queue.c @@ -232,6 +232,24 @@ static int uvc_queue_mmap(struct uvc_video_queue *queue, return ret; } +#ifndef CONFIG_MMU +/* + * Get unmapped area. + * + * NO-MMU arch need this function to make mmap() work correctly. + */ +static unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, + unsigned long pgoff) +{ + unsigned long ret; + + mutex_lock(&queue->mutex); + ret = vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0); + mutex_unlock(&queue->mutex); + return ret; +} +#endif + /* * Cancel the video buffers queue. * |