From patchwork Sun Feb 7 11:36:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaofei Tan X-Patchwork-Id: 378265 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A355C433DB for ; Sun, 7 Feb 2021 11:42:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 082D164E3C for ; Sun, 7 Feb 2021 11:42:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229590AbhBGLlv (ORCPT ); Sun, 7 Feb 2021 06:41:51 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:12482 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229793AbhBGLlD (ORCPT ); Sun, 7 Feb 2021 06:41:03 -0500 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4DYRx03TTMzjKgD; Sun, 7 Feb 2021 19:38:12 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server id 14.3.498.0; Sun, 7 Feb 2021 19:39:24 +0800 From: Xiaofei Tan To: , CC: , , , Xiaofei Tan Subject: [PATCH for-next 01/32] scsi: 53c700: Replace spin_lock_irqsave with spin_lock in hard IRQ Date: Sun, 7 Feb 2021 19:36:32 +0800 Message-ID: <1612697823-8073-2-git-send-email-tanxiaofei@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1612697823-8073-1-git-send-email-tanxiaofei@huawei.com> References: <1612697823-8073-1-git-send-email-tanxiaofei@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org It is redundant to do irqsave and irqrestore in hardIRQ context, where it has been in a irq-disabled context. Signed-off-by: Xiaofei Tan --- drivers/scsi/53c700.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c index 3242ff6..6c2ef46 100644 --- a/drivers/scsi/53c700.c +++ b/drivers/scsi/53c700.c @@ -1491,7 +1491,6 @@ NCR_700_intr(int irq, void *dev_id) __u8 istat; __u32 resume_offset = 0; __u8 pun = 0xff, lun = 0xff; - unsigned long flags; int handled = 0; /* Use the host lock to serialise access to the 53c700 @@ -1499,7 +1498,7 @@ NCR_700_intr(int irq, void *dev_id) * lock to enter the done routines. When that happens, we * need to ensure that for this driver, the host lock and the * queue lock point to the same thing. */ - spin_lock_irqsave(host->host_lock, flags); + spin_lock(host->host_lock); if((istat = NCR_700_readb(host, ISTAT_REG)) & (SCSI_INT_PENDING | DMA_INT_PENDING)) { __u32 dsps; @@ -1748,7 +1747,7 @@ NCR_700_intr(int irq, void *dev_id) } } out_unlock: - spin_unlock_irqrestore(host->host_lock, flags); + spin_unlock(host->host_lock); return IRQ_RETVAL(handled); }