Commit 6e4b308a authored Jul 15, 2011 by Octavian Purdila Committed by Greg Kroah-Hartman Jul 15, 2011

gma500: skip getting modes via DDC on Moorestown



Moorestown does not have a DDC bus, skip getting modes via DDC. This
fixes the following bug:

BUG: unable to handle kernel NULL pointer dereference at 00000010
IP: [<c1172ff7>] i2c_transfer+0x17/0xb0
*pde = 00000000
Oops: 0000 [#1]

Call Trace:
 [<c1153ae9>] drm_do_probe_ddc_edid+0x59/0x90
 [<c1153cb4>] drm_get_edid+0x24/0x250
 [<c11805d2>] psb_intel_ddc_get_modes+0x22/0x60
 [<c117fe11>] psb_intel_lvds_get_modes+0x21/0x80

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 173b3de9

drivers/staging/gma500/psb_intel_lvds.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -521,6 +521,7 @@ static int psb_intel_lvds_get_modes(struct drm_connector *connector)
		psb_intel_output->mode_dev;
		int ret = 0;

		if (!IS_MRST(dev))
		ret = psb_intel_ddc_get_modes(psb_intel_output);

		if (ret)

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