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由 NeilBrown 提交于
I have a report of drop_one_stripe() called from raid5_cache_scan() apparently finding ->max_nr_stripes == 0. This should not be allowed. So add a test to keep max_nr_stripes above min_nr_stripes. Also use a 'mask' rather than a 'mod' in drop_one_stripe to ensure 'hash' is valid even if max_nr_stripes does reach zero. Fixes: edbe83ab ("md/raid5: allow the stripe_cache to grow and shrink.") Cc: stable@vger.kernel.org (4.1 - please release with 2d5b569b) Reported-by: NTomas Papan <tomas.papan@gmail.com> Signed-off-by: NNeilBrown <neilb@suse.com>
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