s390/time: fix clocksource steering for negative clock offsets

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The TOD clock offset injected by an STP sync check can be negative.
If the resulting total tod_steering_delta gets negative the kernel
will panic.

Change the type of tod_steering_delta to a signed type.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 75c7b6f3f6 ("s390/time: steer clocksource on STP sync events")
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Martin Schwidefsky 2016-11-16 16:36:26 +01:00

parent 68962269a4

commit 191ce9d1fd

1 changed files with 3 additions and 4 deletions

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arch/s390/kernel/time.c

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