[PATCH] MTD: fix endian issue of additional protection fields

[Christian Hohnstaedt <chohnstaedt@innominate.com>]

add byte-swapping for extended OTP areas (NumProtectionFields > 1)

Signed-off-by: Christian Hohnstaedt <chohnstaedt@innominate.com>

---

 drivers/mtd/chips/cfi_cmdset_0001.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

0bdeefafb76db54cdb12a10e8fcc5c197221c276
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 0d43581..3227d1e 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -279,11 +279,24 @@ read_pri_intelext(struct map_info *map, 
 	if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') {
 		unsigned int extra_size = 0;
 		int nb_parts, i;
+		struct cfi_intelext_otpinfo *otp;
 
 		/* Protection Register info */
 		extra_size += (extp->NumProtectionFields - 1) *
 			      sizeof(struct cfi_intelext_otpinfo);
 
+		if (extp_size < sizeof(*extp) + extra_size)
+			goto need_more;
+
+		/* Byteswapping for additional ProtectionFields */
+		otp = (struct cfi_intelext_otpinfo*)(extp->extra);
+		for (i=1; i<extp->NumProtectionFields; i++) {
+			otp->ProtRegAddr = le32_to_cpu(otp->ProtRegAddr);
+			otp->FactGroups = le16_to_cpu(otp->FactGroups);
+			otp->UserGroups = le16_to_cpu(otp->UserGroups);
+			otp++;
+		}
+
 		/* Burst Read info */
 		extra_size += 2;
 		if (extp_size < sizeof(*extp) + extra_size)
-- 
Christian Hohnstaedt
Software Engineer

Innominate Security Technologies AG  /device attached security/
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