From 0682c9b52bf51fbc67c4e79fcbdadcf70bd600f8 Mon Sep 17 00:00:00 2001 From: Rajkumar Manoharan Date: Sat, 13 Aug 2011 10:28:09 +0530 Subject: [PATCH] ath9k: Fix rx overrun interrupt storm Whenever RXEOL is received, both RXORN and RXEOL got cleared to avoid rx overrun interrupt storm. This was handled only for edma chips. The same scenario was also observered with AR9280, doing frequent channel type switch b/w HT20/40 with bidi traffic that is causing failure to stop rx dma. This patch clears the RXEOL & RXORN interrupts for all chips. ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x000062c0 ath: Could not stop RX, we could be confusing the DMA engine when we start RX up ------------[ cut here ]------------ WARNING: at drivers/net/wireless/ath/ath9k/recv.c:532 ath_stoprecv+0x110/0x120 [ath9k]() Call Trace: [] warn_slowpath_common+0x7a/0xb0 [] warn_slowpath_null+0x15/0x20 [] ath_stoprecv+0x110/0x120 [ath9k] [] ath_reset+0x6a/0x200 [ath9k] Signed-off-by: Rajkumar Manoharan Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/main.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 781af25f440d..3c5db3063877 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -826,11 +826,9 @@ irqreturn_t ath_isr(int irq, void *dev) if (status & ATH9K_INT_TXURN) ath9k_hw_updatetxtriglevel(ah, true); - if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { - if (status & ATH9K_INT_RXEOL) { - ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN); - ath9k_hw_set_interrupts(ah, ah->imask); - } + if (status & ATH9K_INT_RXEOL) { + ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN); + ath9k_hw_set_interrupts(ah, ah->imask); } if (status & ATH9K_INT_MIB) { -- 2.20.1