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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2016-09-28 13:36:19 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-31 04:14:00 -0600 |
| commit | 5266d3d15f832a98e294422541e3c13949d6aabe (patch) | |
| tree | 1de4bdeda94894b04a0f765b6cc14b76c21db484 /drivers/s390/char | |
| parent | fcf5e5198b447969ed2a56ec335dae3c695a6b46 (diff) | |
s390/cio: fix accidental interrupt enabling during resume
commit d53c51f26145657aa7c55fa396f93677e613548d upstream.
Since commit 9f3d6d7 chsc_get_channel_measurement_chars is called with
interrupts disabled during resume from hibernate. Since this function
used spin_unlock_irq, interrupts have been enabled accidentally. Fix
this by using the irqsave variant.
Since we can't guarantee the IRQ-enablement state for all (future/
external) callers, change the locking in related functions to prevent
similar bugs in the future.
Fixes: 9f3d6d7 ("s390/cio: update measurement characteristics")
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/s390/char')
0 files changed, 0 insertions, 0 deletions