Sebastian Ott 5266d3d15f s390/cio: fix accidental interrupt enabling during resume ...

commit d53c51f261 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>

2016-10-31 04:14:00 -06:00

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airq.c

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blacklist.c

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blacklist.h

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ccwgroup.c

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ccwreq.c

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chp.c

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chp.h

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chsc_sch.c

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chsc_sch.h

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chsc.c

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chsc.h

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cio_debug.h

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cio.c

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cio.h

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cmf.c

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crw.c

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css.c

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css.h

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device_fsm.c

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device_id.c

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device_ops.c

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device_pgid.c

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device_status.c

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device.c

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device.h

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eadm_sch.c

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eadm_sch.h

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fcx.c

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idset.c

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idset.h

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io_sch.h

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ioasm.h

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isc.c

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itcw.c

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Makefile

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orb.h

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qdio_debug.c

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qdio_debug.h

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qdio_main.c

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qdio_setup.c

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qdio_thinint.c

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qdio.h

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scm.c

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