From: Alan Cox <alan@linux.intel.com>
Date: Tue, 20 Jan 2015 12:54:50 +0000 (+0000)
Subject: pnpbios: bail out on strange errors
X-Git-Tag: firefly_0821_release~176^2~2322^2~23
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=625505b509b38b3a389cb3f4fd6520a46763bf45;p=firefly-linux-kernel-4.4.55.git

pnpbios: bail out on strange errors

A small number of systems respond to PnP dock queries with bogus values.
This causes us to keep logging an error every 2 seconds. Instead of trying
again just assume the BIOS is crapware and doesn't actually have dock
functionality.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
index 074569e77d22..facd43b8516c 100644
--- a/drivers/pnp/pnpbios/core.c
+++ b/drivers/pnp/pnpbios/core.c
@@ -181,7 +181,8 @@ static int pnp_dock_thread(void *unused)
 			break;
 		default:
 			pnpbios_print_status("pnp_dock_thread", status);
-			continue;
+			printk(KERN_WARNING "PnPBIOS: disabling dock monitoring.\n");
+			complete_and_exit(&unload_sem, 0);
 		}
 		if (d != docked) {
 			if (pnp_dock_event(d, &now) == 0) {