md/raid5: add missing call to schedule() after prepare_to_wait()
In the unlikely event that reshape progresses past the current request while it is waiting for a stripe we need to schedule() before retrying for 2 reasons: 1/ Prevent list corruption from duplicated list_add() calls without intervening list_del(). 2/ Give the reshape code a chance to make some progress to resolve the conflict. Cc: <stable@kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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@ -3695,6 +3695,7 @@ static int make_request(struct request_queue *q, struct bio * bi)
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spin_unlock_irq(&conf->device_lock);
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spin_unlock_irq(&conf->device_lock);
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if (must_retry) {
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if (must_retry) {
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release_stripe(sh);
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release_stripe(sh);
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schedule();
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goto retry;
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goto retry;
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}
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}
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}
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}
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