linux-stable/drivers/s390
Tony Krowiak 7f9a267c67 s390/vfio-ap: No need to disable IRQ after queue reset
commit 6c12a6384e upstream.

The queues assigned to a matrix mediated device are currently reset when:

* The VFIO_DEVICE_RESET ioctl is invoked
* The mdev fd is closed by userspace (QEMU)
* The mdev is removed from sysfs.

Immediately after the reset of a queue, a call is made to disable
interrupts for the queue. This is entirely unnecessary because the reset of
a queue disables interrupts, so this will be removed.

Furthermore, vfio_ap_irq_disable() does an unconditional PQAP/AQIC which
can result in a specification exception (when the corresponding facility
is not available), so this is actually a bugfix.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
[pasic@linux.ibm.com: minor rework before merging]
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Fixes: ec89b55e3b ("s390: ap: implement PAPQ AQIC interception in kernel")
Cc: <stable@vger.kernel.org>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-03 23:25:57 +01:00
..
block s390/dasd: fix list corruption of lcu list 2020-12-30 11:51:34 +01:00
char
cio s390/cio: fix use-after-free in ccw_device_destroy_console 2020-12-30 11:51:23 +01:00
crypto s390/vfio-ap: No need to disable IRQ after queue reset 2021-02-03 23:25:57 +01:00
net s390/qeth: fix L2 header access in qeth_l3_osa_features_check() 2021-01-17 14:05:32 +01:00
scsi scsi: zfcp: Fix use-after-free in request timeout handlers 2020-08-26 10:40:52 +02:00
virtio
Makefile