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From: Jan Kara <jack@suse.cz>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Jan Kara <jack@suse.cz>
Subject: [PATCH] seq_file: Remove pointless assignment in seq_read()
Date: Wed, 21 Jan 2015 13:46:52 +0100	[thread overview]
Message-ID: <1421844412-15398-2-git-send-email-jack@suse.cz> (raw)
In-Reply-To: <1421844412-15398-1-git-send-email-jack@suse.cz>

The value assigned to 'err' in seq_read() is overwritten by the result
of copy_to_user(). This is correct because we know we have succeeded to
generate at least one entry into user buffer so the error we got when
generating further entries is irrelevant. Just remove the assignment.

Coverity-id: 1226981
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/seq_file.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/seq_file.c b/fs/seq_file.c
index dbf3a59c86bb..548f78308e2a 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -255,10 +255,8 @@ Fill:
 		size_t offs = m->count;
 		loff_t next = pos;
 		p = m->op->next(m, p, &next);
-		if (!p || IS_ERR(p)) {
-			err = PTR_ERR(p);
+		if (!p || IS_ERR(p))
 			break;
-		}
 		err = m->op->show(m, p);
 		if (seq_has_overflowed(m) || err) {
 			m->count = offs;
-- 
2.1.2


  reply	other threads:[~2015-01-21 12:47 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-21 12:46 [PATCH] fs: Check return value of ->show_devname Jan Kara
2015-01-21 12:46 ` Jan Kara [this message]
  -- strict thread matches above, loose matches on Subject: below --
2014-10-21 15:12 [PATCH] seq_file: Remove pointless assignment in seq_read() Jan Kara

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