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authorRichard Kennedy <richard@rsk.demon.co.uk>2010-04-14 20:53:37 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-04-14 20:53:37 +0200
commitc0d97e9ca2cfa66bdfd1ed8ecb5dcd230924d675 (patch)
treecaa22e17a137d1030ce2e71742f66076df19872b /block/Kconfig.iosched
parent28baf44299e0480d66ebb3093de5d51deff04e9f (diff)
downloadvexpress-lsk-c0d97e9ca2cfa66bdfd1ed8ecb5dcd230924d675.tar.gz
block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer
blk_rq_timed_out_timer() relied on blk_add_timer() never returning a timer value of zero, but commit 7838c15b8dd18e78a523513749e5b54bda07b0cb removed the code that bumped this value when it was zero. Therefore when jiffies is near wrap we could get unlucky & not set the timeout value correctly. This patch uses a flag to indicate that the timeout value was set and so handles jiffies wrap correctly, and it keeps all the logic in one function so should be easier to maintain in the future. Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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