linux-kernel - UDLFB: Make sure to get correct endian keys from vendor descriptor

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Message-Id: <09CD7791-DCBE-45BC-96D3-DFE60971D067@ubuntu.com>
Date:	Thu, 16 Feb 2012 16:58:11 -0500
From:	Ben Collins <bcollins@...ntu.com>
To:	linux-kernel@...r.kernel.org
Cc:	Bernie Thompson <bernie@...gable.com>,
	libdlo <libdlo@...ts.freedesktop.org>
Subject: UDLFB:  Make sure to get correct endian keys from vendor descriptor

The driver was not using le16_to_cpu when reading keys from the vendor
descriptor, causing incorrect parsing. Mainly, sku_pixel_limit was not
being parsed on big-endian systems. This left udlfb most certainly
broken on low level chips as the driver allows modes that are too
high for the chip by default.

Signed-off-by: Ben Collins <bcollins@...ntu.com>

diff --git a/drivers/video/udlfb.c b/drivers/video/udlfb.c
index a197731..0319593 100644
--- a/drivers/video/udlfb.c
+++ b/drivers/video/udlfb.c
@@ -1537,7 +1537,7 @@ static int dlfb_parse_vendor_descriptor(struct dlfb_data *dev,
 			u8 length;
 			u16 key;
 
-			key = *((u16 *) desc);
+			key = le16_to_cpu(*((u16 *) desc));
 			desc += sizeof(u16);
 			length = *desc;
 			desc++;

--
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