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(parent: 6896226) | patch
s390/time: fix clocksource steering for negative clock offsets
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Wed, 16 Nov 2016 15:36:26 +0000 (16:36 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 17 Nov 2016 05:56:38 +0000 (06:56 +0100)
commit191ce9d1fde84190f18cd3faf0ef8594f442b313
tree50814453e4dc64c4ec68dde13b09c533d6b1bf9ctree | snapshot
parent68962269a4afda51e2d4794e82b5e187d7710b39commit | diff
s390/time: fix clocksource steering for negative clock offsets

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: 75c7b6f3f6ba ("s390/time: steer clocksource on STP sync events")
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/kernel/time.c diff | blob | history
Domain: System / Kernel;