linux-kernel - [44/80] firmware: Sigma: Fix endianess issues

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Date:	Wed, 07 Dec 2011 08:07:04 -0800
From:	Greg KH <gregkh@...e.de>
To:	<linux-kernel@...r.kernel.org>, <stable@...r.kernel.org>
Cc:	<torvalds@...ux-foundation.org>, <akpm@...ux-foundation.org>,
	<alan@...rguk.ukuu.org.uk>, Lars-Peter Clausen <lars@...afoo.de>,
	Mike Frysinger <vapier@...too.org>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [44/80] firmware: Sigma: Fix endianess issues

3.0-stable review patch.  If anyone has any objections, please let me know.

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

From: Lars-Peter Clausen <lars@...afoo.de>

commit bda63586bc5929e97288cdb371bb6456504867ed upstream.

Currently the SigmaDSP firmware loader only works correctly on little-endian
systems. Fix this by using the proper endianess conversion functions.

Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
Acked-by: Mike Frysinger <vapier@...too.org>
Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/firmware/sigma.c |    2 +-
 include/linux/sigma.h    |    8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/firmware/sigma.c
+++ b/drivers/firmware/sigma.c
@@ -133,7 +133,7 @@ int process_sigma_firmware(struct i2c_cl
 	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)
+	if (crc != le32_to_cpu(ssfw_head->crc))
 		goto done;
 
 	ssfw.pos = sizeof(*ssfw_head);
--- a/include/linux/sigma.h
+++ b/include/linux/sigma.h
@@ -24,7 +24,7 @@ struct sigma_firmware {
 struct sigma_firmware_header {
 	unsigned char magic[7];
 	u8 version;
-	u32 crc;
+	__le32 crc;
 };
 
 enum {
@@ -40,14 +40,14 @@ enum {
 struct sigma_action {
 	u8 instr;
 	u8 len_hi;
-	u16 len;
-	u16 addr;
+	__le16 len;
+	__be16 addr;
 	unsigned char payload[];
 };
 
 static inline u32 sigma_action_len(struct sigma_action *sa)
 {
-	return (sa->len_hi << 16) | sa->len;
+	return (sa->len_hi << 16) | le16_to_cpu(sa->len);
 }
 
 extern int process_sigma_firmware(struct i2c_client *client, const char *name);


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