38 lines
1021 B
Plaintext
38 lines
1021 B
Plaintext
From: Nikanth Karthikesan <knikanth@suse.de>
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Subject: Release md->map_lock before set_disk_ro
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Patch-mainline: No
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References: bnc#556899 bnc#479784
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Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
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Calling set_disk_ro() with irqs disabled triggers a warning.
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set_disk_ro() can be called outside the
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write_lock_irqsave(&md->map_lock)? And to get the
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dm_table_get_mode(md->map), we just need to hold a reference
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with dm_get_table() and dm_table_put()
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---
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drivers/md/dm.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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--- a/drivers/md/dm.c
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+++ b/drivers/md/dm.c
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@@ -2174,12 +2174,15 @@ static struct dm_table *__bind(struct ma
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old_map = md->map;
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md->map = t;
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dm_table_set_restrictions(t, q, limits);
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+ write_unlock_irqrestore(&md->map_lock, flags);
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+
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+ dm_table_get(md->map);
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if (!(dm_table_get_mode(t) & FMODE_WRITE)) {
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set_disk_ro(md->disk, 1);
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} else {
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set_disk_ro(md->disk, 0);
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}
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- write_unlock_irqrestore(&md->map_lock, flags);
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+ dm_table_put(md->map);
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return old_map;
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}
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