Re: [PATCH] usb: gadget/uvc: Remove non-required locking from 'uvc_queue_next_buffer' routine

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Hi Bhupesh,

On Friday 23 March 2012 17:31:19 Bhupesh SHARMA wrote:
> On Thursday, March 22, 2012 8:11 PM Gregg KH wrote:
> > On Thu, Mar 22, 2012 at 10:20:37AM +0530, Bhupesh Sharma wrote:
> > > This patch removes the non-required spinlock acquire/release calls on
> > > 'queue_irqlock' from 'uvc_queue_next_buffer' routine.
> > > 
> > > This routine is called from 'video->encode' function (which translates
> > > to either 'uvc_video_encode_bulk' or 'uvc_video_encode_isoc') in
> > > 'uvc_video.c'. As, the 'video->encode' routines are called with
> > > 'queue_irqlock' already held, so acquiring a 'queue_irqlock' again in
> > > 'uvc_queue_next_buffer' routine causes a spin lock recursion.
> > > 
> > > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@xxxxxx>
> > > Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> > > ---
> > > 
> > >  drivers/usb/gadget/uvc_queue.c |    4 +---
> > >  1 files changed, 1 insertions(+), 3 deletions(-)
> > 
> > Please use scripts/get_maintainer.pl to determine who to send this to
> > (hint, it's not me...)
> 
> Can you please pick this USB webcam gadget/peripheral specific patch
> in your tree?

Could you please first resubmit with the comments fix as asked by Sergei 
Shtylyov ? (s/queue_irqlock/queue->irqlock/)

-- 
Regards,

Laurent Pinchart

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