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authorLinus Torvalds <torvalds@linux-foundation.org>2016-09-23 11:50:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-09-23 11:50:49 -0700
commit78bbf153fa96e5e40234b7b05567602535645460 (patch)
tree8a5ddbd676128035182e08555d81152bf0cffb6f /drivers
parent2ddfdd428906749e45a6b765712d1c68e5daa723 (diff)
parentf0aa1ce6259eb65f53f969b3250c1d0aac84f30b (diff)
downloadlinux-stericsson-78bbf153fa96e5e40234b7b05567602535645460.tar.gz
Merge tag 'regmap-fix-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap fix from Mark Brown: "A fix for an issue with double locking that was introduced earlier this release. I'd missed in review that we were already in a locked region when trying to drop part of the cache" * tag 'regmap-fix-v4.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: fix deadlock on _regmap_raw_write() error path
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/regmap/regmap.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 25d26bb18970..e964d068874d 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1475,7 +1475,11 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
kfree(buf);
} else if (ret != 0 && !map->cache_bypass && map->format.parse_val) {
- regcache_drop_region(map, reg, reg + 1);
+ /* regcache_drop_region() takes lock that we already have,
+ * thus call map->cache_ops->drop() directly
+ */
+ if (map->cache_ops && map->cache_ops->drop)
+ map->cache_ops->drop(map, reg, reg + 1);
}
trace_regmap_hw_write_done(map, reg, val_len / map->format.val_bytes);