package/kernel/mac80211/patches/328-ath9k-fix-processing-RXORN-interrupts.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Sat, 18 Oct 2014 13:31:52 +0200
   3 Subject: [PATCH] ath9k: fix processing RXORN interrupts
   4
   5 The "goto chip_reset" is a bit misleading, because it does not actually
   6 issue a chip reset. Instead it is bypassing processing of other
   7 interrupts and assumes that the tasklet will issue a chip reset.
   8
   9 In the case of RXORN this does not happen, so bypassing processing of
  10 other interrupts will simply allow them to fire again. Even if RXORN
  11 was triggering a reset, it is not critical enough to need the bypass
  12 here.
  13
  14 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  15 ---
  16
  17 --- a/drivers/net/wireless/ath/ath9k/main.c
  18 +++ b/drivers/net/wireless/ath/ath9k/main.c
  19 @@ -545,11 +545,10 @@ irqreturn_t ath_isr(int irq, void *dev)
  20                 sched = true;
  21
  22         /*
  23 -        * If a FATAL or RXORN interrupt is received, we have to reset the
  24 -        * chip immediately.
  25 +        * If a FATAL interrupt is received, we have to reset the chip
  26 +        * immediately.
  27          */
  28 -       if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
  29 -           !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
  30 +       if (status & ATH9K_INT_FATAL)
  31                 goto chip_reset;
  32
  33         if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) &&