linux-kernel - [PATCH 1/5] drm/gma500: fix error path in gma_intel_setup

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Date:	Tue,  9 Feb 2016 21:11:12 +0100
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	Patrik Jakobsson <patrik.r.jakobsson@...il.com>,
	David Airlie <airlied@...ux.ie>
Cc:	Rasmus Villemoes <linux@...musvillemoes.dk>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] drm/gma500: fix error path in gma_intel_setup_gmbus()

The current code fails to call i2c_del_adapter on
dev_prev->gmbus[0].adapter, and if the for loop above failed already
at i==0, all hell breaks loose when we do the loop body for
i = -1,-2,...

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 drivers/gpu/drm/gma500/intel_gmbus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/gma500/intel_gmbus.c b/drivers/gpu/drm/gma500/intel_gmbus.c
index 566d330aaeea..e7e22187c539 100644
--- a/drivers/gpu/drm/gma500/intel_gmbus.c
+++ b/drivers/gpu/drm/gma500/intel_gmbus.c
@@ -436,7 +436,7 @@ int gma_intel_setup_gmbus(struct drm_device *dev)
 	return 0;
 
 err:
-	while (--i) {
+	while (i--) {
 		struct intel_gmbus *bus = &dev_priv->gmbus[i];
 		i2c_del_adapter(&bus->adapter);
 	}
-- 
2.1.4