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author | Al Viro <viro@zeniv.linux.org.uk> | 2016-11-02 03:09:04 +0100 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-12-05 20:33:36 +0100 |
commit | cbbd26b8b1a6af9c02e2b6523e12bd50cc765059 (patch) | |
tree | 6d1b258c99e83f320cf3611bdc927121df7e9b03 /kernel/printk | |
parent | Linux 4.9-rc7 (diff) | |
download | linux-cbbd26b8b1a6af9c02e2b6523e12bd50cc765059.tar.xz linux-cbbd26b8b1a6af9c02e2b6523e12bd50cc765059.zip |
[iov_iter] new primitives - copy_from_iter_full() and friends
copy_from_iter_full(), copy_from_iter_full_nocache() and
csum_and_copy_from_iter_full() - counterparts of copy_from_iter()
et.al., advancing iterator only in case of successful full copy
and returning whether it had been successful or not.
Convert some obvious users. *NOTE* - do not blindly assume that
something is a good candidate for those unless you are sure that
not advancing iov_iter in failure case is the right thing in
this case. Anything that does short read/short write kind of
stuff (or is in a loop, etc.) is unlikely to be a good one.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/printk')
-rw-r--r-- | kernel/printk/printk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index f7a55e9ff2f7..f6bda15396df 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -748,7 +748,7 @@ static ssize_t devkmsg_write(struct kiocb *iocb, struct iov_iter *from) return -ENOMEM; buf[len] = '\0'; - if (copy_from_iter(buf, len, from) != len) { + if (!copy_from_iter_full(buf, len, from)) { kfree(buf); return -EFAULT; } |