bcm63xx: Fix caldata partition mtd patch

Allow bcm63xxpart to receive a caldata offset if calibration data is contained in flash.

Tested-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

SVN-Revision: 35010

target/linux/brcm63xx/patches-3.6/436-MTD-bcm63xxpart-allow-passing-a-caldata-offset.patch

@@ -1,18 +1,18 @@
-From 8ab86c5dc38ad4de1442e50e0adbc354d9184d71 Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jonas.gorski@gmail.com>
-Date: Tue, 1 May 2012 14:38:41 +0200
-Subject: [PATCH 68/79] MTD: bcm63xxpart: allow passing a caldata offset
-
 Allow bcm63xxpart to receive a caldata offset if calibration data is
 contained in flash.
 ---
- drivers/mtd/bcm63xxpart.c      |   47 ++++++++++++++++++++++++++++++++++++++--
- include/linux/mtd/partitions.h |    2 ++
- 2 files changed, 47 insertions(+), 2 deletions(-)
+ drivers/mtd/bcm63xxpart.c      |   51 ++++++++++++++++++++++++++++++++++++---
+ include/linux/mtd/partitions.h |    2 +
+ 2 files changed, 49 insertions(+), 4 deletions(-)
 
 --- a/drivers/mtd/bcm63xxpart.c
 +++ b/drivers/mtd/bcm63xxpart.c
-@@ -80,6 +80,8 @@ static int bcm63xx_parse_cfe_partitions(
+@@ -76,10 +76,12 @@ static int bcm63xx_parse_cfe_partitions(
+ 	struct mtd_partition *parts;
+ 	int ret;
+ 	size_t retlen;
+-	unsigned int rootfsaddr, kerneladdr, spareaddr;
++	unsigned int rootfsaddr, kerneladdr, spareaddr, nvramaddr;
  	unsigned int rootfslen, kernellen, sparelen, totallen;
  	unsigned int cfelen, nvramlen;
  	unsigned int cfe_erasesize;
@@ -21,10 +21,12 @@ contained in flash.
  	int i;
  	u32 computed_crc;
  	bool rootfs_first = false;
-@@ -94,6 +96,23 @@ static int bcm63xx_parse_cfe_partitions(
+@@ -93,6 +95,24 @@ static int bcm63xx_parse_cfe_partitions(
+ 	cfelen = cfe_erasesize;
  	nvramlen = bcm63xx_nvram_get_psi_size() * 1024;
  	nvramlen = roundup(nvramlen, cfe_erasesize);
- 
++	nvramaddr = master->size - nvramlen;
++
 +	if (data) {
 +		if (data->caldata[0]) {
 +			caldatalen1 = cfe_erasesize;
@@ -41,20 +43,19 @@ contained in flash.
 +			caldatalen2 = 0;
 +		}
 +	}
-+
+ 
  	/* Allocate memory for buffer */
  	buf = vmalloc(sizeof(struct bcm_tag));
- 	if (!buf)
-@@ -144,7 +163,7 @@ static int bcm63xx_parse_cfe_partitions(
+@@ -144,7 +164,7 @@ static int bcm63xx_parse_cfe_partitions(
  		rootfsaddr = 0;
  		spareaddr = cfelen;
  	}
 -	sparelen = master->size - spareaddr - nvramlen;
-+	sparelen = master->size - spareaddr - nvramlen - caldatalen1 - caldatalen2;
++	sparelen = min_not_zero(nvramaddr, caldataaddr1) - spareaddr;
  
  	/* Determine number of partitions */
  	if (rootfslen > 0)
-@@ -153,6 +172,12 @@ static int bcm63xx_parse_cfe_partitions(
+@@ -153,6 +173,12 @@ static int bcm63xx_parse_cfe_partitions(
  	if (kernellen > 0)
  		nrparts++;
  
@@ -67,7 +68,7 @@ contained in flash.
  	/* Ask kernel for more memory */
  	parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
  	if (!parts) {
-@@ -190,6 +215,23 @@ static int bcm63xx_parse_cfe_partitions(
+@@ -190,15 +216,32 @@ static int bcm63xx_parse_cfe_partitions(
  		curpart++;
  	}
  
@@ -89,15 +90,16 @@ contained in flash.
 +	}
 +
  	parts[curpart].name = "nvram";
- 	parts[curpart].offset = master->size - nvramlen;
+-	parts[curpart].offset = master->size - nvramlen;
++	parts[curpart].offset = nvramaddr;
  	parts[curpart].size = nvramlen;
-@@ -198,7 +240,8 @@ static int bcm63xx_parse_cfe_partitions(
+ 	curpart++;
+ 
  	/* Global partition "linux" to make easy firmware upgrade */
  	parts[curpart].name = "linux";
  	parts[curpart].offset = cfelen;
 -	parts[curpart].size = master->size - cfelen - nvramlen;
-+	parts[curpart].size = master->size - cfelen - nvramlen
-+			      - caldatalen1 - caldatalen2;
++	parts[curpart].size = min_not_zero(nvramaddr, caldataaddr1) - cfelen;
  
  	for (i = 0; i < nrparts; i++)
  		pr_info("Partition %d is %s offset %llx and length %llx\n", i,