Patch "s390/dasd: check for device error pointer within state change interrupts" has been added to the 3.18-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

    s390/dasd: check for device error pointer within state change interrupts

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     s390-dasd-check-for-device-error-pointer-within-state-change-interrupts.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From foo@baz Mon Nov  6 10:42:09 CET 2017
From: Stefan Haberland <sth@xxxxxxxxxxxxxxxxxx>
Date: Sat, 7 Oct 2017 22:38:01 +0000
Subject: s390/dasd: check for device error pointer within state change interrupts

From: Stefan Haberland <sth@xxxxxxxxxxxxxxxxxx>


[ Upstream commit 2202134e48a3b50320aeb9e3dd1186833e9d7e66 ]

Check if the device pointer is valid. Just a sanity check since we already
are in the int handler of the device.

Signed-off-by: Stefan Haberland <sth@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/s390/block/dasd.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -1672,8 +1672,11 @@ void dasd_int_handler(struct ccw_device
 	/* check for for attention message */
 	if (scsw_dstat(&irb->scsw) & DEV_STAT_ATTENTION) {
 		device = dasd_device_from_cdev_locked(cdev);
-		device->discipline->check_attention(device, irb->esw.esw1.lpum);
-		dasd_put_device(device);
+		if (!IS_ERR(device)) {
+			device->discipline->check_attention(device,
+							    irb->esw.esw1.lpum);
+			dasd_put_device(device);
+		}
 	}
 
 	if (!cqr)


Patches currently in stable-queue which might be from sth@xxxxxxxxxxxxxxxxxx are

queue-3.18/s390-dasd-check-for-device-error-pointer-within-state-change-interrupts.patch



[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]