1 files changed, 106 insertions, 0 deletions
diff --git a/package/boot/uboot-envtools/patches/115-writing-environment-for-mtd-devices.patch b/package/boot/uboot-envtools/patches/115-writing-environment-for-mtd-devices.patch
new file mode 100644
index 0000000..96d0fd9
--- /dev/null
+++ b/package/boot/uboot-envtools/patches/115-writing-environment-for-mtd-devices.patch
@@ -0,0 +1,106 @@
+tools/fw_env: fix writing environment for mtd devices
+
+Signed-off-by: Oliver Metz <oliver@freetz.org>
+---
+ tools/env/fw_env.c | 71 ++++++++++++++++++++++++++++++++----------------------
+ 1 file changed, 42 insertions(+), 29 deletions(-)
+
+--- a/tools/env/fw_env.c
++++ b/tools/env/fw_env.c
+@@ -743,27 +743,39 @@ static int flash_write_buf (int dev, int
+ 				   MEMGETBADBLOCK needs 64 bits */
+ 	int rc;
+ 
+-	blocklen = DEVESIZE (dev);
++	/*
++	 * For mtd devices only offset and size of the environment do matter
++	 */
++	if (mtd_type == MTD_ABSENT) {
++		blocklen = count;
++		top_of_range = offset + count;
++		erase_len = blocklen;
++		blockstart = offset;
++		block_seek = 0;
++		write_total = blocklen;
++	} else {
++		blocklen = DEVESIZE (dev);
+ 
+-	top_of_range = ((DEVOFFSET(dev) / blocklen) +
+-					ENVSECTORS (dev)) * blocklen;
++		top_of_range = ((DEVOFFSET(dev) / blocklen) +
++						ENVSECTORS (dev)) * blocklen;
+ 
+-	erase_offset = (offset / blocklen) * blocklen;
++		erase_offset = (offset / blocklen) * blocklen;
+ 
+-	/* Maximum area we may use */
+-	erase_len = top_of_range - erase_offset;
++		/* Maximum area we may use */
++		erase_len = top_of_range - erase_offset;
+ 
+-	blockstart = erase_offset;
+-	/* Offset inside a block */
+-	block_seek = offset - erase_offset;
++		blockstart = erase_offset;
++		/* Offset inside a block */
++		block_seek = offset - erase_offset;
+ 
+-	/*
+-	 * Data size we actually have to write: from the start of the block
+-	 * to the start of the data, then count bytes of data, and to the
+-	 * end of the block
+-	 */
+-	write_total = ((block_seek + count + blocklen - 1) /
+-						blocklen) * blocklen;
++		/*
++		 * Data size we actually write: from the start of the block
++		 * to the start of the data, then count bytes of data, and to the
++		 * end of the block
++		 */
++		write_total = ((block_seek + count + blocklen - 1) /
++							blocklen) * blocklen;
++	}
+ 
+ 	/*
+ 	 * Support data anywhere within erase sectors: read out the complete
+@@ -834,17 +846,18 @@ static int flash_write_buf (int dev, int
+ 			continue;
+ 		}
+ 
+-		erase.start = blockstart;
+-		ioctl (fd, MEMUNLOCK, &erase);
+-		/* These do not need an explicit erase cycle */
+-		if (mtd_type != MTD_ABSENT &&
+-		    mtd_type != MTD_DATAFLASH)
+-			if (ioctl (fd, MEMERASE, &erase) != 0) {
+-				fprintf (stderr, "MTD erase error on %s: %s\n",
+-					 DEVNAME (dev),
+-					 strerror (errno));
+-				return -1;
+-			}
++		if (mtd_type != MTD_ABSENT) {
++			erase.start = blockstart;
++			ioctl (fd, MEMUNLOCK, &erase);
++			/* These do not need an explicit erase cycle */
++			if (mtd_type != MTD_DATAFLASH)
++				if (ioctl (fd, MEMERASE, &erase) != 0) {
++					fprintf (stderr, "MTD erase error on %s: %s\n",
++						 DEVNAME (dev),
++						 strerror (errno));
++					return -1;
++				}
++		}
+ 
+ 		if (lseek (fd, blockstart, SEEK_SET) == -1) {
+ 			fprintf (stderr,
+@@ -862,8 +875,8 @@ static int flash_write_buf (int dev, int
+ 				 DEVNAME (dev), strerror (errno));
+ 			return -1;
+ 		}
+-
+-		ioctl (fd, MEMLOCK, &erase);
++		if (mtd_type != MTD_ABSENT)
++			ioctl (fd, MEMLOCK, &erase);
+ 
+ 		processed  += blocklen;
+ 		block_seek = 0;