tap: Fix EAGAIN/EWOULDBLOCK check in tap_pasta_input()

On Linux, EAGAIN and EWOULDBLOCK have the same value. Commit
d2a1dc744b10 ("tap: Restructure in tap_pasta_input()") added a check for
EWOULDBLOCK on purpose:

> - Check for EWOULDBLOCK as well as EAGAIN for the benefit of any future
>   ports where those might not have the same value

However, the condition uses && instead of ||, so it can never be true on a
platform where EAGAIN and EWOULDBLOCK are different.

Use || instead so that the check works as intended on such platforms.

Fixes: d2a1dc744b10 ("tap: Restructure in tap_pasta_input()")
Signed-off-by: Hayato Kiwata <dev@haytok.jp>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tap.c b/tap.c
index d418961..cf87591 100644
--- a/tap.c
+++ b/tap.c
@@ -1329,7 +1329,7 @@ static void tap_pasta_input(struct ctx *c, const struct timespec *now)
 				continue;
 			}
 
-			if (errno == EAGAIN && errno == EWOULDBLOCK)
+			if (errno == EAGAIN || errno == EWOULDBLOCK)
 				break; /* all done for now */
 
 			die("Error on tap device, exiting");