linux-kernel - [023/107] Revert "drm/i915: Enable GMBUS for post-gen2 chipsets"

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Date:	Thu, 07 Jul 2011 17:15:55 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jean Delvare <khali@...ux-fr.org>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Dave Airlie <airlied@...hat.com>,
	Ben Hutchings <ben@...adent.org.uk>
Subject: [023/107] Revert "drm/i915: Enable GMBUS for post-gen2 chipsets"

2.6.39-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Jean Delvare <khali@...ux-fr.org>

commit 826c7e4147f902737b281e8a5a7d7aa33fd63316 upstream.

Revert commit 8f9a3f9b63b8cd3f03be9dc53533f90bd4120e5f. This fixes a
hang when loading the eeprom driver (see bug #35572.) GMBUS will be
re-enabled later, differently.

Signed-off-by: Jean Delvare <khali@...ux-fr.org>
Reported-by: Marek Otahal <markotahal@...il.com>
Tested-by: Yermandu Patapitafious <yermandu.dev@...il.com>
Tested-by: Andrew Lutomirski <luto@....edu>
Acked-by: Chris Wilson <chris@...is-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Cc: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/i915/intel_i2c.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/gpu/drm/i915/intel_i2c.c
+++ b/drivers/gpu/drm/i915/intel_i2c.c
@@ -401,8 +401,7 @@ int intel_setup_gmbus(struct drm_device
 		bus->reg0 = i | GMBUS_RATE_100KHZ;
 
 		/* XXX force bit banging until GMBUS is fully debugged */
-		if (IS_GEN2(dev))
-			bus->force_bit = intel_gpio_create(dev_priv, i);
+		bus->force_bit = intel_gpio_create(dev_priv, i);
 	}
 
 	intel_i2c_reset(dev_priv->dev);


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