From: Lars-Peter Clausen <lars@metafoo.de>
Date: Mon, 28 Nov 2011 08:44:15 +0000 (+0100)
Subject: firmware: Sigma: Skip header during CRC generation
X-Git-Tag: firefly_0821_release~3680^2~3864^2~18
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c56935bdc0a8edf50237d3b0205133a5b0adc604;p=firefly-linux-kernel-4.4.55.git

firmware: Sigma: Skip header during CRC generation

The firmware header is not part of the CRC, so skip it. Otherwise the firmware
will be rejected due to non-matching CRCs.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
---

diff --git a/drivers/firmware/sigma.c b/drivers/firmware/sigma.c
index c780baa59ed9..36265de0a9e8 100644
--- a/drivers/firmware/sigma.c
+++ b/drivers/firmware/sigma.c
@@ -130,7 +130,8 @@ int process_sigma_firmware(struct i2c_client *client, const char *name)
 	if (memcmp(ssfw_head->magic, SIGMA_MAGIC, ARRAY_SIZE(ssfw_head->magic)))
 		goto done;
 
-	crc = crc32(0, fw->data, fw->size);
+	crc = crc32(0, fw->data + sizeof(*ssfw_head),
+			fw->size - sizeof(*ssfw_head));
 	pr_debug("%s: crc=%x\n", __func__, crc);
 	if (crc != ssfw_head->crc)
 		goto done;