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| author | Roel Kluin <roel.kluin@gmail.com> | 2009-01-06 14:40:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:59:08 -0800 |
| commit | 91bf189c3a766927694ce9de7d545e96b23f20fc (patch) | |
| tree | c9b289cffce3bf7606b8c166b446d3a2185463b0 | |
| parent | b555749aac87d7c2637f153e44bd77c7fdf4c65b (diff) | |
| download | linux-3.10-91bf189c3a766927694ce9de7d545e96b23f20fc.tar.gz linux-3.10-91bf189c3a766927694ce9de7d545e96b23f20fc.tar.bz2 linux-3.10-91bf189c3a766927694ce9de7d545e96b23f20fc.zip | |
hugetlb: unsigned ret cannot be negative
unsigned long ret cannot be negative, but ret can get -EFAULT.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Ken Chen <kenchen@google.com>
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/hugetlbfs/inode.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 0ab0c6f5f43..6903d37af03 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -252,6 +252,7 @@ static ssize_t hugetlbfs_read(struct file *filp, char __user *buf, for (;;) { struct page *page; unsigned long nr, ret; + int ra; /* nr is the maximum number of bytes to copy from this page */ nr = huge_page_size(h); @@ -274,16 +275,19 @@ static ssize_t hugetlbfs_read(struct file *filp, char __user *buf, */ ret = len < nr ? len : nr; if (clear_user(buf, ret)) - ret = -EFAULT; + ra = -EFAULT; + else + ra = 0; } else { /* * We have the page, copy it to user space buffer. */ - ret = hugetlbfs_read_actor(page, offset, buf, len, nr); + ra = hugetlbfs_read_actor(page, offset, buf, len, nr); + ret = ra; } - if (ret < 0) { + if (ra < 0) { if (retval == 0) - retval = ret; + retval = ra; if (page) page_cache_release(page); goto out; |