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| author | Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> | 2015-06-25 15:00:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-25 17:00:36 -0700 |
| commit | 4bbacd51a683e45c13f7d6df6f85cb7391590311 (patch) | |
| tree | 6226f69a81061f779f19f7af1c1e604c77d76ab5 /drivers/block | |
| parent | 17162f41f04a3ba5a6b887a8e8e7f78159fa4a70 (diff) | |
| download | blackbird-op-linux-4bbacd51a683e45c13f7d6df6f85cb7391590311.tar.gz blackbird-op-linux-4bbacd51a683e45c13f7d6df6f85cb7391590311.zip | |
zram: cut trailing newline in algorithm name
Supplied sysfs values sometimes contain new-line symbols (echo vs. echo
-n), which we also copy as a compression algorithm name. it works fine
when we lookup for compression algorithm, because we use sysfs_streq()
which takes care of new line symbols. however, it doesn't look nice when
we print compression algorithm name if zcomp_create() failed:
zram: Cannot initialise LXZ
compressing backend
cut trailing new-line, so the error string will look like
zram: Cannot initialise LXZ compressing backend
we also now can replace sysfs_streq() in zcomp_available_show() with
strcmp().
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/zram/zcomp.c | 2 | ||||
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index f1ff39a3d1c1..a1a8b8ee9fda 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -274,7 +274,7 @@ ssize_t zcomp_available_show(const char *comp, char *buf) int i = 0; while (backends[i]) { - if (sysfs_streq(comp, backends[i]->name)) + if (!strcmp(comp, backends[i]->name)) sz += scnprintf(buf + sz, PAGE_SIZE - sz - 2, "[%s] ", backends[i]->name); else diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index a129d52711a6..d94696b28a85 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -363,6 +363,8 @@ static ssize_t comp_algorithm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct zram *zram = dev_to_zram(dev); + size_t sz; + down_write(&zram->init_lock); if (init_done(zram)) { up_write(&zram->init_lock); @@ -370,6 +372,12 @@ static ssize_t comp_algorithm_store(struct device *dev, return -EBUSY; } strlcpy(zram->compressor, buf, sizeof(zram->compressor)); + + /* ignore trailing newline */ + sz = strlen(zram->compressor); + if (sz > 0 && zram->compressor[sz - 1] == '\n') + zram->compressor[sz - 1] = 0x00; + up_write(&zram->init_lock); return len; } |
