md/raid5: Avoid BUG caused by multiple failures.

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While preparing to write a stripe we keep the parity block or blocks
locked (R5_LOCKED) - towards the end of schedule_reconstruction.

If the array is discovered to have failed before this write completes
we can leave those blocks LOCKED, and init_stripe will notice that a
free stripe still has a locked block and will complain.

So clear the R5_LOCKED flag in handle_failed_stripe, and demote the
'BUG' to a 'WARN_ON'.

Signed-off-by: NeilBrown <neilb@suse.de>

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This commit is contained in:

NeilBrown 2011-07-27 11:00:36 +10:00

parent cbea21703b

commit 8cfa7b0f67

1 changed files with 5 additions and 1 deletions

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drivers/md/raid5.c

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