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 <[email protected]>
Acked-by: Mike Frysinger <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Cc: [email protected]

diff --git a/drivers/firmware/sigma.c b/drivers/firmware/sigma.c
index c780baa59ed965759a322db926f1e4fc56bcf991..36265de0a9e8acad8ac9e45c5e49ed8c00dd98e9 100644 (file)
--- 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;