Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756240Ab2E3BoG (ORCPT ); Tue, 29 May 2012 21:44:06 -0400 Received: from masquerade.micron.com ([137.201.242.130]:15511 "EHLO masquerade.micron.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756155Ab2E3BoE (ORCPT ); Tue, 29 May 2012 21:44:04 -0400 Message-ID: <4FC57B61.5020004@micron.com> Date: Tue, 29 May 2012 18:44:01 -0700 From: Asai Thambi S P User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Jens Axboe , "linux-kernel@vger.kernel.org" , Sam Bradshaw Subject: [PATCH 08/11] mtip32xx: minor performance tweak Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-TM-AS-Product-Ver: SMEX-10.0.0.4152-6.800.1017-18936.003 X-TM-AS-Result: No--4.642100-0.000000-31 X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-MT-CheckInternalSenderRule: True Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1063 Lines: 30 When checking for command completions if the register value is zero, proceed to next register. Signed-off-by: Asai Thambi S P --- drivers/block/mtip32xx/mtip32xx.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index acc1d6f..d0fa357 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -970,6 +970,8 @@ static inline void mtip_process_sdbf(struct driver_data *dd) /* walk all bits in all slot groups */ for (group = 0; group < dd->slot_groups; group++) { completed = readl(port->completed[group]); + if (!completed) + continue; /* clear completed status register in the hardware.*/ writel(completed, port->completed[group]); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/