On Mon, 26 Dec 2011, Larry Finger wrote:
> On 12/26/2011 11:28 AM, Guennadi Liakhovetski wrote:
> > This patch fixes the regression, introduced by
> >
> > commit 17030f48e31adde5b043741c91ba143f5f7db0fd
> > From: Rafał Miłecki<zajec5@xxxxxxxxx>
> > Date: Thu, 11 Aug 2011 17:16:27 +0200
> > Subject: [PATCH] b43: support new RX header, noticed to be used in 598.314+
> > fw
> >
> > in PIO case.
> >
> > Signed-off-by: Guennadi Liakhovetski<g.liakhovetski@xxxxxx>
> > ---
> > diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
> > index ce8a4bd..b64b64c 100644
> > --- a/drivers/net/wireless/b43/pio.c
> > +++ b/drivers/net/wireless/b43/pio.c
> > @@ -617,9 +617,19 @@ static bool pio_rx_frame(struct b43_pio_rxqueue *q)
> > const char *err_msg = NULL;
> > struct b43_rxhdr_fw4 *rxhdr =
> > (struct b43_rxhdr_fw4 *)wl->pio_scratchspace;
> > + size_t rxhdr_size = sizeof(*rxhdr);
> >
> > BUILD_BUG_ON(sizeof(wl->pio_scratchspace)< sizeof(*rxhdr));
> > - memset(rxhdr, 0, sizeof(*rxhdr));
> > + switch (dev->fw.hdr_format) {
> > + case B43_FW_HDR_410:
> > + case B43_FW_HDR_351:
> > + rxhdr_size -= sizeof(rxhdr->format_598) -
> > + sizeof(rxhdr->format_351);
> > + break;
> > + case B43_FW_HDR_598:
> > + break;
> > + }
>
> I do not think the above will work for format_410. By my count, the format_410
> struct is 4 bytes longer than the format_351 struct.
I think you're looking at struct b43_txhdr, whereas the problem is in
struct b43_rxhdr_fw4.
Thanks
Guennadi
>
> Even if it does work, I suggest using the following:
>
> size_t rxhdr_size;
>
> BUILD_BUG_ON(sizeof(wl->pio_scratchspace)< sizeof(*rxhdr));
> switch (dev->fw.hdr_format) {
> case B43_FW_HDR_351:
> rxhdr_size = sizeof(rxhdr->format_351);
> break;
> case B43_FW_HDR_410:
> etc.
>
>
> Larry
>
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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