linux-kernel - [PATCH for-next 14/32] scsi: ibmvscsi: Replace spin_lock_irqsave with spin

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 7 Feb 2021 19:36:45 +0800
From:   Xiaofei Tan <tanxiaofei@...wei.com>
To:     <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...neuler.org>, Xiaofei Tan <tanxiaofei@...wei.com>
Subject: [PATCH for-next 14/32] scsi: ibmvscsi: Replace spin_lock_irqsave with spin_lock in hard IRQ

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 <tanxiaofei@...wei.com>
---
 drivers/scsi/ibmvscsi/ibmvfc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 755313b..9afe1b2 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -3604,12 +3604,11 @@ static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost)
 static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance)
 {
 	struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance;
-	unsigned long flags;
 
-	spin_lock_irqsave(vhost->host->host_lock, flags);
+	spin_lock(vhost->host->host_lock);
 	vio_disable_interrupts(to_vio_dev(vhost->dev));
 	tasklet_schedule(&vhost->tasklet);
-	spin_unlock_irqrestore(vhost->host->host_lock, flags);
+	spin_unlock(vhost->host->host_lock);
 	return IRQ_HANDLED;
 }
 
-- 
2.8.1