From 9bf084f70ffde6521d113593b89461a5bd2a303b Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Tue, 16 Oct 2007 23:26:18 -0700 Subject: [PATCH] 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 Cc: Andi Kleen Cc: Davide Libenzi Cc: Vadim Lobanov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/select.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/fs/select.c b/fs/select.c index 41c3571e64ed..e2fd58f8f1db 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) { -- 2.20.1