From: Sebastian Ott <sebott@linux.vnet.ibm.com>
Date: Mon, 7 Dec 2009 11:51:39 +0000 (+0100)
Subject: [S390] cio: change locking in io_subchannel_remove
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7a8ad1001c51bba0507ee08cb4323d8ddcb07c70;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[S390] cio: change locking in io_subchannel_remove

IO subchannels are always unregistered in process context, so use
spin_lock_irq in the corresponding remove callback.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index bd6e8cf77fa..dc97cb9f227 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1065,17 +1065,16 @@ static int
 io_subchannel_remove (struct subchannel *sch)
 {
 	struct ccw_device *cdev;
-	unsigned long flags;
 
 	cdev = sch_get_cdev(sch);
 	if (!cdev)
 		goto out_free;
 	io_subchannel_quiesce(sch);
 	/* Set ccw device to not operational and drop reference. */
-	spin_lock_irqsave(cdev->ccwlock, flags);
+	spin_lock_irq(cdev->ccwlock);
 	sch_set_cdev(sch, NULL);
 	cdev->private->state = DEV_STATE_NOT_OPER;
-	spin_unlock_irqrestore(cdev->ccwlock, flags);
+	spin_unlock_irq(cdev->ccwlock);
 	ccw_device_unregister(cdev);
 out_free:
 	kfree(sch->private);