pvpanic: Set high notifier priority

commit 7939831eacd81fccbd7a956b30c7bb3abb9079db upstream.

We've observed the missing pvpanic call at panic, and it turned out
that this was blocked by the broken notifier of drm_fb_helper, where
scheduling may be called during switching to the fb console.
It's fairly difficult to fix the drm_fb problem and a quick fix isn't
foreseen, a simpler solution for the missing pvpanic call would be
just to call this earlier.

In order to assure that, this patch sets a higher priority to pvpanic
notifier_block.  Once when the issue of drm_fb is resolved, we can
remove this priority again.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/drivers/platform/x86/pvpanic.c b/drivers/platform/x86/pvpanic.c
index 47ae0c47d4b5ccf67749cc110f86788e7c74753f..469e182c5461db0415b2028a01fc1b72bdd339b6 100644 (file)
--- a/drivers/platform/x86/pvpanic.c
+++ b/drivers/platform/x86/pvpanic.c
@@ -71,6 +71,7 @@ pvpanic_panic_notify(struct notifier_block *nb, unsigned long code,
 
 static struct notifier_block pvpanic_panic_nb = {
        .notifier_call = pvpanic_panic_notify,
+       .priority = 1, /* let this called before broken drm_fb_helper */
 };