From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932378AbdJXPGm (ORCPT ); Tue, 24 Oct 2017 11:06:42 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:50580 "EHLO huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751705AbdJXPF3 (ORCPT ); Tue, 24 Oct 2017 11:05:29 -0400 From: John Garry To: , CC: , , , , Xiaofei Tan , John Garry Subject: [PATCH 03/19] scsi: hisi_sas: use spin_lock_irqsave() for hisi_hba.lock Date: Tue, 24 Oct 2017 23:51:33 +0800 Message-ID: <1508860309-212397-4-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1508860309-212397-1-git-send-email-john.garry@huawei.com> References: <1508860309-212397-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xiaofei Tan We used spin_lock() to grab hisi_hba.lock in two places where spin_lock_irqsave() should be used, as hisi_hba.lock can be taken in interrupt context. This patch is to fix this. Signed-off-by: Xiaofei Tan Signed-off-by: John Garry --- drivers/scsi/hisi_sas/hisi_sas_main.c | 5 +++-- drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 0eb9174..e038bdf 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -505,9 +505,10 @@ static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device) { struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); struct hisi_sas_device *sas_dev = NULL; + unsigned long flags; int i; - spin_lock(&hisi_hba->lock); + spin_lock_irqsave(&hisi_hba->lock, flags); for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) { if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) { int queue = i % hisi_hba->queue_count; @@ -524,7 +525,7 @@ static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device) break; } } - spin_unlock(&hisi_hba->lock); + spin_unlock_irqrestore(&hisi_hba->lock, flags); return sas_dev; } diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c index 779af97..73d12ff 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c +++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c @@ -843,8 +843,9 @@ hisi_sas_device *alloc_dev_quirk_v2_hw(struct domain_device *device) struct hisi_sas_device *sas_dev = NULL; int i, sata_dev = dev_is_sata(device); int sata_idx = -1; + unsigned long flags; - spin_lock(&hisi_hba->lock); + spin_lock_irqsave(&hisi_hba->lock, flags); if (sata_dev) if (!sata_index_alloc_v2_hw(hisi_hba, &sata_idx)) @@ -874,7 +875,7 @@ hisi_sas_device *alloc_dev_quirk_v2_hw(struct domain_device *device) } out: - spin_unlock(&hisi_hba->lock); + spin_unlock_irqrestore(&hisi_hba->lock, flags); return sas_dev; } -- 1.9.1