package/kernel/mac80211/patches/361-0003-brcmfmac-fix-incorrect-event-channel-deduction.patch

   1 From 8e290cecdd0178f3d4cf7d463c51dc7e462843b4 Mon Sep 17 00:00:00 2001
   2 From: Gavin Li <git@thegavinli.com>
   3 Date: Tue, 17 Jan 2017 15:24:05 -0800
   4 Subject: [PATCH] brcmfmac: fix incorrect event channel deduction
   5
   6 brcmf_sdio_fromevntchan() was being called on the the data frame
   7 rather than the software header, causing some frames to be
   8 mischaracterized as on the event channel rather than the data channel.
   9
  10 This fixes a major performance regression (due to dropped packets). With
  11 this patch the download speed jumped from 1Mbit/s back up to 40MBit/s due
  12 to the sheer amount of packets being incorrectly processed.
  13
  14 Fixes: c56caa9db8ab ("brcmfmac: screening firmware event packet")
  15 Signed-off-by: Gavin Li <git@thegavinli.com>
  16 Cc: <stable@vger.kernel.org> # 4.7+
  17 Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  18 [kvalo@codeaurora.org: improve commit logs based on email discussion]
  19 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  20 ---
  21  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 2 +-
  22  1 file changed, 1 insertion(+), 1 deletion(-)
  23
  24 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
  25 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
  26 @@ -1661,7 +1661,7 @@ static u8 brcmf_sdio_rxglom(struct brcmf
  27                                            pfirst->len, pfirst->next,
  28                                            pfirst->prev);
  29                         skb_unlink(pfirst, &bus->glom);
  30 -                       if (brcmf_sdio_fromevntchan(pfirst->data))
  31 +                       if (brcmf_sdio_fromevntchan(&dptr[SDPCM_HWHDR_LEN]))
  32                                 brcmf_rx_event(bus->sdiodev->dev, pfirst);
  33                         else
  34                                 brcmf_rx_frame(bus->sdiodev->dev, pfirst,