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authorTang Junhui <tang.junhui@zte.com.cn>2018-02-07 11:41:45 -0800
committerJens Axboe <axboe@kernel.dk>2018-02-07 12:50:01 -0700
commit7f4fc93d4713394ee8f1cd44c238e046e11b4f15 (patch)
tree335e2ce8e0eb29e7b21878dea04d9c3472eaa9b2 /block/bfq-iosched.c
parent7a5e3ecbe5b7b58e9a78a3738b28244982822e1c (diff)
downloadlinux-0-day-7f4fc93d4713394ee8f1cd44c238e046e11b4f15.tar.gz
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bcache: return attach error when no cache set exist
I attach a back-end device to a cache set, and the cache set is not registered yet, this back-end device did not attach successfully, and no error returned: [root]# echo 87859280-fec6-4bcc-20df7ca8f86b > /sys/block/sde/bcache/attach [root]# In sysfs_attach(), the return value "v" is initialized to "size" in the beginning, and if no cache set exist in bch_cache_sets, the "v" value would not change any more, and return to sysfs, sysfs regard it as success since the "size" is a positive number. This patch fixes this issue by assigning "v" with "-ENOENT" in the initialization. Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn> Reviewed-by: Michael Lyle <mlyle@lyle.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.c')
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