RE: [PATCH 07/11] xHCI: remove redundant parameter in giveback_first_trb()

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> -----Original Message-----
> From: Sarah Sharp [mailto:sarah.a.sharp@xxxxxxxxxxxxxxx]
> Sent: Friday, January 07, 2011 12:37 AM
> To: Sergei Shtylyov
> Cc: linux-usb@xxxxxxxxxxxxxxx; Xu, Andiry
> Subject: Re: [PATCH 07/11] xHCI: remove redundant parameter in
> giveback_first_trb()
> 
> On Thu, Jan 06, 2011 at 03:16:32PM +0300, Sergei Shtylyov wrote:
> > Hello.
> >
> > On 05-01-2011 19:41, Sarah Sharp wrote:
> >
> > >>>From: Andiry Xu <andiry.xu@xxxxxxx>
> >
> > >>>Parameter *td is not used in giveback_first_trb(). Remove it.
> >
> > >>>Signed-off-by: Andiry Xu<andiry.xu@xxxxxxx>
> > >>>Signed-off-by: Sarah Sharp<sarah.a.sharp@xxxxxxxxxxxxxxx>
> > >>>---
> > >>>  drivers/usb/host/xhci-ring.c |   14 ++++++--------
> > >>>  1 files changed, 6 insertions(+), 8 deletions(-)
> >
> > >>>diff --git a/drivers/usb/host/xhci-ring.c
b/drivers/usb/host/xhci-
> ring.c
> > >>>index 55dc156..59f81b5 100644
> > >>>--- a/drivers/usb/host/xhci-ring.c
> > >>>+++ b/drivers/usb/host/xhci-ring.c
> > >>[...]
> > >>>@@ -3006,10 +3006,8 @@ static int xhci_queue_isoc_tx(struct
xhci_hcd
> *xhci, gfp_t mem_flags,
> > >>>  		}
> > >>>  	}
> > >>>
> > >>>-	wmb();
> > >>>-	start_trb->field[3] |= start_cycle;
> > >>>-
> > >>>-	xhci_ring_ep_doorbell(xhci, slot_id, ep_index,
urb->stream_id);
> > >>>+	giveback_first_trb(xhci, slot_id, ep_index,
urb->stream_id,
> > >>>+			start_cycle, start_trb);
> >
> > >>    Hm, this change is not descripbed...
> >
> > >It's just replacing an instance where the code inside
> > >giveback_first_trb() was used instead of calling the actual
function,
> > >for whatever reason.  It's not changing behavior.  Yes, it probably
> > >should have been a separate patch,
> >
> >    Not necessarily. But it should've been described at least.
> 
> Andiry,
> 
> It's true that anyone who's not familiar with the giveback_first_trb()
> function would wonder where this change came from.  Since Greg isn't
> going to take these patchset until after the merge, can you please
> respin it with a comment about replacing code equivalent to
> giveback_first_trb() in xhci_queue_isoc_tx() with a call to the actual
> function.  The description is a bit terse.
> 

Sure, will do.

Thanks,
Andiry

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