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| author | Tony Krowiak <akrowiak@linux.ibm.com> | 2020-12-23 04:15:53 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-01-27 15:00:04 +0300 |
| commit | 6c12a6384e0c0b96debd88b24028e58f2ebd417b (patch) | |
| tree | 504731c5481ac406b4b3f2bc7f4702eac1e34a71 /net | |
| parent | f21916ec4826766463fe9fb55a5f43d2a365811d (diff) | |
| download | linux-6c12a6384e0c0b96debd88b24028e58f2ebd417b.tar.xz | |
s390/vfio-ap: No need to disable IRQ after queue reset
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: ec89b55e3bce ("s390: ap: implement PAPQ AQIC interception in kernel")
Cc: <stable@vger.kernel.org>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions