Messages in this thread Patch in this message | | | Date | Tue, 27 Dec 2011 17:47:09 -0600 | From | Larry Finger <> | Subject | Re: [PATCH] b43: fix regression in PIO case |
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On 12/27/2011 05:05 PM, Guennadi Liakhovetski wrote: > On Tue, 27 Dec 2011, Rafał Miłecki wrote: > >> W dniu 26 grudnia 2011 18:28 użytkownik Guennadi Liakhovetski >> <g.liakhovetski@gmx.de> napisał: >>> This patch fixes the regression, introduced by >>> >>> commit 17030f48e31adde5b043741c91ba143f5f7db0fd >>> From: Rafał Miłecki<zajec5@gmail.com> >>> 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@gmx.de> >>> --- >>> 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; >>> + } >>> + memset(rxhdr, 0, rxhdr_size); >> >> Huuh, that's really tricky. Can you just do "normal" conditions as >> Larry suggested, please? > > Sorry? I absolutely see nothing tricky there. Do you think this would look > "less tricky" to you: > > switch (dev->fw.hdr_format) { > case B43_FW_HDR_410: > case B43_FW_HDR_351: > rxhdr_size = offsetof(struct b43_rxhdr_fw4, > format_351) + > sizeof(rxhdr_size->format_351); > break; > case B43_FW_HDR_598: > rxhdr_size = sizeof(*rxhdr); > break; > } >
How about this?
Index: wireless-testing-new/drivers/net/wireless/b43/pio.c =================================================================== --- wireless-testing-new.orig/drivers/net/wireless/b43/pio.c +++ wireless-testing-new/drivers/net/wireless/b43/pio.c @@ -617,9 +617,20 @@ static bool pio_rx_frame(struct b43_pio_ const char *err_msg = NULL; struct b43_rxhdr_fw4 *rxhdr = (struct b43_rxhdr_fw4 *)wl->pio_scratchspace; + size_t rxhdr_size;
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_351); + break; + case B43_FW_HDR_598: + default: + rxhdr_size = sizeof(rxhdr->format_598); + break; + } + memset(rxhdr, 0, rxhdr_size);
/* Check if we have data and wait for it to get ready. */ if (q->rev >= 8) { Larry
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