From: Huang Shijie <shijie8@gmail.com>
To: dwmw2@infradead.org
Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
dedekind1@gmail.com, Huang Shijie <shijie8@gmail.com>
Subject: [PATCH v2] mtd: cmdlinepart: fix the wrong partitions number when truncating occurs
Date: Sat, 25 Aug 2012 10:26:07 -0400 [thread overview]
Message-ID: <1345904767-23011-1-git-send-email-shijie8@gmail.com> (raw)
Assume we have a 1GB(8Gb) nand chip, and we set the partitions
in the command line like this:
#gpmi-nand:100m(boot),100m(kernel),1g(rootfs)
In this case, the partition truncating occurs. The current code will
get the following result:
----------------------------------
root@freescale ~$ cat /proc/mtd
dev: size erasesize name
mtd0: 06400000 00040000 "boot"
mtd1: 06400000 00040000 "kernel"
----------------------------------
It is obvious that we lost the truncated partition `rootfs` which should
be 824M in this case.
Why? The old code sets the wrong partitions number when the truncating
occurs. This patch fixes it. Alao add a `break` to shortcut the code in this
case.
After apply this patch, the result becomes:
----------------------------------
root@freescale ~$ cat /proc/mtd
dev: size erasesize name
mtd0: 06400000 00040000 "boot"
mtd1: 06400000 00040000 "kernel"
mtd2: 33800000 00040000 "rootfs"
----------------------------------
We get the right result.
Signed-off-by: Huang Shijie <shijie8@gmail.com>
---
v1 --> v2:
[1] add more commit info.
---
drivers/mtd/cmdlinepart.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c
index 4558e0f..fc960a3 100644
--- a/drivers/mtd/cmdlinepart.c
+++ b/drivers/mtd/cmdlinepart.c
@@ -344,7 +344,8 @@ static int parse_cmdline_partitions(struct mtd_info *master,
"%s: partitioning exceeds flash size, truncating\n",
part->mtd_id);
part->parts[i].size = master->size - offset;
- part->num_parts = i;
+ part->num_parts = i + 1;
+ break;
}
offset += part->parts[i].size;
}
--
1.7.4.4
next reply other threads:[~2012-08-25 2:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-25 14:26 Huang Shijie [this message]
2012-08-25 9:02 ` [PATCH v2] mtd: cmdlinepart: fix the wrong partitions number when truncating occurs Shmulik Ladkani
2012-08-25 9:26 ` Huang Shijie
2012-08-25 9:42 ` Shmulik Ladkani
2012-08-25 11:07 ` Huang Shijie
2012-08-26 6:06 ` Shmulik Ladkani
2012-08-26 6:47 ` Huang Shijie
2012-08-29 8:24 ` Artem Bityutskiy
2012-08-29 8:48 ` Huang Shijie
2012-08-29 8:16 ` Artem Bityutskiy
2012-08-29 8:51 ` Shmulik Ladkani
2012-08-29 9:10 ` Artem Bityutskiy
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