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authorArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-01-16 11:07:16 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2012-01-30 14:23:07 +0000
commit1a30871fe635d3e92972e6b93e39ff65bb57e52d (patch)
treea9b1dec4e9ab56faba549e7b1a1cec2cbe22b111 /include
parentbce41d601e58af12cee1398fe836e6b9a8fb5396 (diff)
mtd: fix MTD suspend
Commits 3fe4bae88460869a8e553397cd9057a4ee7ca341 and 079c985e7a6f4ce60f931cebfdd5ee3c3 broke MTD suspend in 2 ways: 1. When the '->suspend' method is not present, we return -EOPNOTSUPP, but the callers of 'mtd_suspend()' expects 0 instead. 2. Checking of the 'mtd' parameter against NULL has been incorrectly removed in 'mtd_cls_suspend()'. This patch fixes the breakages. This has been found, analyzed, reported and tested by Rafael J. Wysocki <rjw@sisk.pl>. Note, this patch is not needed in the stable tree because it causes a regression introduced during the v3.3 merge window. Reported-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mtd/mtd.h4
1 files changed, 1 insertions, 3 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 1a81fde8f333..d8c7aad7331c 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -427,9 +427,7 @@ static inline int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
static inline int mtd_suspend(struct mtd_info *mtd)
{
- if (!mtd->suspend)
- return -EOPNOTSUPP;
- return mtd->suspend(mtd);
+ return mtd->suspend ? mtd->suspend(mtd) : 0;
}
static inline void mtd_resume(struct mtd_info *mtd)