linux-kernel - [RESEND PATCH] pnpbios: bail out on strange errors

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Message-ID: <20150120125429.8451.39702.stgit@localhost.localdomain>
Date:	Tue, 20 Jan 2015 12:54:50 +0000
From:	Alan Cox <alan@...ux.intel.com>
To:	greg@...ah.com, linux-kernel@...r.kernel.org
Subject: [RESEND PATCH] 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@...ux.intel.com>
---
 drivers/pnp/pnpbios/core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
index 074569e..facd43b 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) {

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