diff options
Diffstat (limited to 'drivers/md/bcache/sysfs.c')
| -rw-r--r-- | drivers/md/bcache/sysfs.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 22f8565d2bf1..81d3520b0702 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -265,10 +265,17 @@ STORE(__cached_dev) sysfs_strtoul_clamp(writeback_percent, dc->writeback_percent, 0, 40); if (attr == &sysfs_writeback_rate) { - int v; + ssize_t ret; + long int v = atomic_long_read(&dc->writeback_rate.rate); + + ret = strtoul_safe_clamp(buf, v, 1, INT_MAX); - sysfs_strtoul_clamp(writeback_rate, v, 1, INT_MAX); - atomic_long_set(&dc->writeback_rate.rate, v); + if (!ret) { + atomic_long_set(&dc->writeback_rate.rate, v); + ret = size; + } + + return ret; } sysfs_strtoul_clamp(writeback_rate_update_seconds, |