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authorTejun Heo <tj@kernel.org>2015-08-18 14:55:28 -0700
committerJens Axboe <axboe@fb.com>2015-08-18 15:49:18 -0700
commit20386ce0143899ccb5bcbda714436a82d3029f33 (patch)
treef1fe9b3a30a3afce0ea20632b830007495d95b0a /block/cfq-iosched.c
parent5332dfc36483d2373d980526145789a354af2d49 (diff)
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blkcg: refine error codes returned during blkcg configuration
blkcg currently returns -EINVAL for most errors which can be pretty confusing given that the failure modes are quite varied. Update the error returns so that * -EINVAL only for syntactic errors. * -ERANGE if the value is out of range. * -ENODEV if the target device can't be found. * -EOPNOTSUPP if the policy is not enabled on the target device. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/cfq-iosched.c')
-rw-r--r--block/cfq-iosched.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index bcf40266bd0a..38277e3ce286 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1755,7 +1755,7 @@ static ssize_t __cfqg_set_weight_device(struct kernfs_open_file *of,
cfqg = blkg_to_cfqg(ctx.blkg);
cfqgd = blkcg_to_cfqgd(blkcg);
- ret = -EINVAL;
+ ret = -ERANGE;
if (!ctx.v || (ctx.v >= CFQ_WEIGHT_MIN && ctx.v <= CFQ_WEIGHT_MAX)) {
if (!is_leaf_weight) {
cfqg->dev_weight = ctx.v;