* Patch "s390/dasd: check for device error pointer within state change interrupts" has been added to the 4.9-stable tree
@ 2017-11-06 9:11 gregkh
0 siblings, 0 replies; only message in thread
From: gregkh @ 2017-11-06 9:11 UTC (permalink / raw)
To: sth, alexander.levin, gregkh, schwidefsky; +Cc: stable, stable-commits
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 4.9-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-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Mon Nov 6 10:07:35 CET 2017
From: Stefan Haberland <sth@linux.vnet.ibm.com>
Date: Sat, 7 Oct 2017 22:36:56 +0000
Subject: s390/dasd: check for device error pointer within state change interrupts
From: Stefan Haberland <sth@linux.vnet.ibm.com>
[ 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@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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
@@ -1704,8 +1704,11 @@ 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@linux.vnet.ibm.com are
queue-4.9/s390-dasd-check-for-device-error-pointer-within-state-change-interrupts.patch
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2017-11-06 9:11 Patch "s390/dasd: check for device error pointer within state change interrupts" has been added to the 4.9-stable tree gregkh
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