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swh:1:snp:c3bf2749e3476071fa748f67b0ffa2fdc5fe49d9
Revision 48cae885d5a896030588978f503c73c5ed5e62b1 authored by Stefan Weinhuber on 11 February 2009, 09:37:31 UTC, committed by Martin Schwidefsky on 11 February 2009, 09:37:40 UTC 
[S390] dasd: fix race in dasd timer handling
 
In dasd_device_set_timer and dasd_block_set_timer we interpret the
return value of mod_timer in a wrong way. If the timer expires in
the small window between our check of timer_pending and the call to
mod_timer, then the timer will be set, mod_timer returns zero and
we will call add_timer for a timer that is already pending.
As del_timer and mod_timer do all the necessary checking themselves,
we can simplify our code and remove the race a the same time.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
1 parent ca0b4b7
History
Tip revision: d1221cea11fca0f6946bdd032a45b22cecfc0f99 authored by Linus Torvalds on 13 September 2022, 13:11:38 UTC
Merge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Tip revision: d1221ce
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