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

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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.

Sarah Sharp
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