From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933179Ab3BYW3k (ORCPT ); Mon, 25 Feb 2013 17:29:40 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:55169 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932171Ab3BYWUL (ORCPT ); Mon, 25 Feb 2013 17:20:11 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Larry Finger , Bastian Bittorf , "David S. Miller" Subject: [ 21/58] b43: Increase number of RX DMA slots Date: Mon, 25 Feb 2013 14:19:17 -0800 Message-Id: <20130225221640.615851869@linuxfoundation.org> X-Mailer: git-send-email 1.8.1.rc1.5.g7e0651a In-Reply-To: <20130225221636.018756060@linuxfoundation.org> References: <20130225221636.018756060@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.7-stable review patch. If anyone has any objections, please let me know. ------------------ From: Larry Finger commit ccae0e50c16a7f7adb029c169147400d1ce9f703 upstream. 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 Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/b43/dma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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)