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authorOleg Nesterov <oleg@tv-sign.ru>2007-10-17 06:26:18 (GMT)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 15:42:48 (GMT)
commit9bf084f70ffde6521d113593b89461a5bd2a303b (patch)
treeea62a8c9c54d0f702e73e9fa6e6c8699106ab892 /fs/select.c
parent252e5725cfb55a89e54888317856903fef9d5031 (diff)
downloadlinux-9bf084f70ffde6521d113593b89461a5bd2a303b.tar.xz
do_poll: return -EINTR when signalled
do_poll() checks signal_pending() but returns 0 when interrupted. This means the caller has to check signal_pending() again. Change it to return -EINTR when signal_pending() and count == 0. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Andi Kleen <ak@suse.de> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Vadim Lobanov <vlobanov@speakeasy.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/select.c')
-rw-r--r--fs/select.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/select.c b/fs/select.c
index 41c3571..e2fd58f 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -586,7 +586,7 @@ static int do_poll(unsigned int nfds, struct poll_list *list,
/* Optimise the no-wait case */
if (!(*timeout))
pt = NULL;
-
+
for (;;) {
struct poll_list *walk;
long __timeout;
@@ -616,10 +616,12 @@ static int do_poll(unsigned int nfds, struct poll_list *list,
* a poll_table to them on the next loop iteration.
*/
pt = NULL;
- if (count || !*timeout || signal_pending(current))
- break;
- count = wait->error;
- if (count)
+ if (!count) {
+ count = wait->error;
+ if (signal_pending(current))
+ count = -EINTR;
+ }
+ if (count || !*timeout)
break;
if (*timeout < 0) {
@@ -689,8 +691,6 @@ int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds, s64 *timeout)
poll_initwait(&table);
fdcount = do_poll(nfds, head, &table, timeout);
- if (!fdcount && signal_pending(current))
- fdcount = -EINTR;
poll_freewait(&table);
for (walk = head; walk; walk = walk->next) {