From cf9a2f3afc75d41a61cbc91e725b9ce0746c400a Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 23 Sep 2010 16:17:33 +0100
Subject: [PATCH] drm/i915/sdvo: Handle unsupported GET_SUPPORTED_ENHANCEMENTS
gracefully
In the event that the external chipset doesn't implement the
GET_SUPPORTED_ENHANCEMENTS commands, gracefully treat it as having no
enhancments rather than bailing.
Reported-and-tested-by: Woody Suwalski <terraluna977@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=18342
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/intel_sdvo.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 60fcef700be6..ee73e428a84a 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -2520,11 +2520,10 @@ static bool intel_sdvo_create_enhance_property(struct intel_sdvo *intel_sdvo,
uint16_t response;
} enhancements;
- if (!intel_sdvo_get_value(intel_sdvo,
- SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS,
- &enhancements, sizeof(enhancements)))
- return false;
-
+ enhancements.response = 0;
+ intel_sdvo_get_value(intel_sdvo,
+ SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS,
+ &enhancements, sizeof(enhancements));
if (enhancements.response == 0) {
DRM_DEBUG_KMS("No enhancement is supported\n");
return true;
--
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