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| author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-01-16 11:07:16 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-01-30 14:23:07 +0000 |
| commit | 1a30871fe635d3e92972e6b93e39ff65bb57e52d (patch) | |
| tree | a9b1dec4e9ab56faba549e7b1a1cec2cbe22b111 /include/linux/mtd | |
| parent | bce41d601e58af12cee1398fe836e6b9a8fb5396 (diff) | |
| download | linux-stable-1a30871fe635d3e92972e6b93e39ff65bb57e52d.tar.gz linux-stable-1a30871fe635d3e92972e6b93e39ff65bb57e52d.tar.bz2 linux-stable-1a30871fe635d3e92972e6b93e39ff65bb57e52d.zip | |
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/linux/mtd')
| -rw-r--r-- | include/linux/mtd/mtd.h | 4 |
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) |