[PATCH] xen-fbfront: correct return value checks on xenbus_scanf()
STALE3741d
From: Jan Beulich <hidden>
Date: 2016-07-07 07:48:53
Also in:
xen-devel
Only a positive return value indicates success. Signed-off-by: Jan Beulich <redacted> --- drivers/video/fbdev/xen-fbfront.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- 4.7-rc6-xenbus_scanf.orig/drivers/video/fbdev/xen-fbfront.c
+++ 4.7-rc6-xenbus_scanf/drivers/video/fbdev/xen-fbfront.c@@ -658,13 +658,13 @@ InitWait: goto InitWait; /* no InitWait seen yet, fudge it */ if (xenbus_scanf(XBT_NIL, info->xbdev->otherend, - "request-update", "%d", &val) < 0) + "request-update", "%d", &val) <= 0) val = 0; if (val) info->update_wanted = 1; if (xenbus_scanf(XBT_NIL, dev->otherend, - "feature-resize", "%d", &val) < 0) + "feature-resize", "%d", &val) <= 0) val = 0; info->feature_resize = val; break;