Return-path: Received: from mail-gg0-f182.google.com ([209.85.161.182]:50138 "EHLO mail-gg0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751508Ab3BRDBf (ORCPT ); Sun, 17 Feb 2013 22:01:35 -0500 From: Larry Finger To: linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, Larry Finger , netdev@vger.kernel.org, Bastian Bittorf , Stable Subject: [PATCH] b43: Increase number of RX DMA slots Date: Sun, 17 Feb 2013 21:01:20 -0600 Message-Id: <1361156480-32566-1-git-send-email-Larry.Finger@lwfinger.net> (sfid-20130218_040139_590459_FDF3411B) Sender: linux-wireless-owner@vger.kernel.org List-ID: Bastian Bittorf reported that some of the silent freezes on a Linksys WRT54G were due to overflow of the RX DMA ring buffer, which was created with 64 slots. That finding reminded me that I was seeing similar crashed on a netbook, which also has a relatively slow processor. After increasing the number of slots to 128, runs on the netbook that previously failed now worked; however, I found that 109 slots had been used in one test. For that reason, the number of slots is being increased to 256. Signed-off-by: Larry Finger Cc: Bastian Bittorf Cc: Stable --- --- drivers/net/wireless/b43/dma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/b43/dma.h b/drivers/net/wireless/b43/dma.h index 315b96e..9fdd198 100644 --- a/drivers/net/wireless/b43/dma.h +++ b/drivers/net/wireless/b43/dma.h @@ -169,7 +169,7 @@ struct b43_dmadesc_generic { /* DMA engine tuning knobs */ #define B43_TXRING_SLOTS 256 -#define B43_RXRING_SLOTS 64 +#define B43_RXRING_SLOTS 256 #define B43_DMA0_RX_FW598_BUFSIZE (B43_DMA0_RX_FW598_FO + IEEE80211_MAX_FRAME_LEN) #define B43_DMA0_RX_FW351_BUFSIZE (B43_DMA0_RX_FW351_FO + IEEE80211_MAX_FRAME_LEN) -- 1.8.1.1