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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-04-09 09:03:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-04-09 09:03:51 -0700 |
| commit | 5b50be743f495b000891d430ecba7372cc59bb64 (patch) | |
| tree | a6559ebf1669bc76494a9f5722d19868407eb539 /fs/sysfs | |
| parent | 62e1fd08ede3ea2af25b3aa5f81c6c525bac2ce3 (diff) | |
| parent | 27f395b857abee5bced8356d39e1a491ff08748a (diff) | |
Merge tag 'driver-core-4.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are 3 small fixes for 4.11-rc6.
One resolves a reported issue with sysfs files that NeilBrown found,
one is a documenatation fix for the stable kernel rules, and the last
is a small MAINTAINERS file update for kernfs"
* tag 'driver-core-4.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
MAINTAINERS: separate out kernfs maintainership
sysfs: be careful of error returns from ops->show()
Documentation: stable-kernel-rules: fix stable-tag format
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/file.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index b803213d1307..39c75a86c67f 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -108,7 +108,7 @@ static ssize_t sysfs_kf_read(struct kernfs_open_file *of, char *buf, { const struct sysfs_ops *ops = sysfs_file_ops(of->kn); struct kobject *kobj = of->kn->parent->priv; - size_t len; + ssize_t len; /* * If buf != of->prealloc_buf, we don't know how @@ -117,13 +117,15 @@ static ssize_t sysfs_kf_read(struct kernfs_open_file *of, char *buf, if (WARN_ON_ONCE(buf != of->prealloc_buf)) return 0; len = ops->show(kobj, of->kn->priv, buf); + if (len < 0) + return len; if (pos) { if (len <= pos) return 0; len -= pos; memmove(buf, buf + pos, len); } - return min(count, len); + return min_t(ssize_t, count, len); } /* kernfs write callback for regular sysfs files */ |