[U-Boot] [PATCH] NAND: cmd_nand.c: fix invalid pointers to static relocated chip names

[U-Boot] [PATCH] NAND: cmd_nand.c: fix invalid pointers to static relocated chip names

[Valeriy Glushkov]

When U-boot starting from NAND the pointers to chip names are set before relocation.
If the original memory block is overwritten after relocation that led to invalid
string data in the nand utility.

Signed-off-by: Valeriy Glushkov <gvv@lstec.com>
---
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index b94a2bf..14925cd 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -10,6 +10,7 @@
 
 #include <common.h>
 
+DECLARE_GLOBAL_DATA_PTR;
 
 #ifndef CONFIG_NAND_LEGACY
 /*
@@ -193,7 +194,7 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 		for (i = 0; i < CFG_MAX_NAND_DEVICE; i++) {
 			if (nand_info[i].name)
 				printf("Device %d: %s, sector size %u KiB\n",
-				       i, nand_info[i].name,
+				       i, nand_info[i].name + gd->reloc_off,
 				       nand_info[i].erasesize >> 10);
 		}
 		return 0;
@@ -207,7 +208,7 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 				puts("\nno devices available\n");
 			else
 				printf("\nDevice %d: %s\n", nand_curr_device,
-				       nand_info[nand_curr_device].name);
+				       nand_info[nand_curr_device].name + gd->reloc_off);
 			return 0;
 		}
 		dev = (int)simple_strtoul(argv[2], NULL, 10);
@@ -215,7 +216,7 @@ int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 			puts("No such device\n");
 			return 1;
 		}
-		printf("Device %d: %s", dev, nand_info[dev].name);
+		printf("Device %d: %s", dev, nand_info[dev].name + gd->reloc_off);
 		puts("... is now current device\n");
 		nand_curr_device = dev;
 
@@ -993,8 +994,8 @@ int do_nandboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	show_boot_progress (55);
 
 	printf ("\nLoading from device %d: %s at 0x%lx (offset 0x%lx)\n",
-	    dev, nand_dev_desc[dev].name, nand_dev_desc[dev].IO_ADDR,
-	    offset);
+	    dev, nand_dev_desc[dev].name + gd->reloc_off,
+	    nand_dev_desc[dev].IO_ADDR, offset);
 
 	if (nand_legacy_rw (nand_dev_desc + dev, NANDRW_READ, offset,
 			    SECTORSIZE, NULL, (u_char *)addr)) {
-- 
1.5.2.5

[U-Boot] [PATCH] NAND: cmd_nand.c: fix invalid pointers to static relocated chip names

[Wolfgang Denk]

Dear Valeriy Glushkov,

In message <12323711841178-git-send-email-gvv@lstec.com> you wrote:
> When U-boot starting from NAND the pointers to chip names are set before relocation.
> If the original memory block is overwritten after relocation that led to invalid
> string data in the nand utility.

This means that the pointers need to be manually relocated.

> -				       i, nand_info[i].name,
> +				       i, nand_info[i].name + gd->reloc_off,

Such relocation shouldbe done exactly once, right after relocation.

Doing this everywhere where the pointers are references is error
prone, ugly and wastes memory.

Please change your patch to fix the pointers. Thanks.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"We all agree on the necessity of compromise. We just can't agree  on
when it's necessary to compromise."
                - Larry Wall in  <1991Nov13.194420.28091@netlabs.com>

[U-Boot] [PATCH v2] nand: Fixed invalid pointers to static relocated chip names

[Valeriy Glushkov]

Dear Wolfgang,

You are right, the patch was ugly.
The new one seems to be better.

Signed-off-by: Valeriy Glushkov <gvv@lstec.com>
---
diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c
index 700d21d..8ac53e0 100644
--- a/drivers/mtd/nand/nand.c
+++ b/drivers/mtd/nand/nand.c
@@ -28,6 +28,8 @@
 #define CFG_NAND_BASE_LIST { CFG_NAND_BASE }
 #endif
 
+DECLARE_GLOBAL_DATA_PTR;
+
 int nand_curr_device = -1;
 nand_info_t nand_info[CFG_MAX_NAND_DEVICE];
 
@@ -48,6 +50,8 @@ static void nand_init_chip(struct mtd_info *mtd, struct nand_chip *nand,
 		if (nand_scan(mtd, 1) == 0) {
 			if (!mtd->name)
 				mtd->name = (char *)default_nand_name;
+			else
+				mtd->name += gd->reloc_off;
 		} else
 			mtd->name = NULL;
 	} else {
-- 
1.5.2.5

[U-Boot] [PATCH v2] nand: Fixed invalid pointers to static relocated chip names

[Scott Wood]

On Mon, Jan 19, 2009 at 04:32:59PM +0200, Valeriy Glushkov wrote:
> Dear Wolfgang,
> 
> You are right, the patch was ugly.
> The new one seems to be better.
> 
> Signed-off-by: Valeriy Glushkov <gvv@lstec.com>

Applied to u-boot-nand-flash.

-Scott