flash_erase ERROR!

[Brian Norris]

Hey, sorry for the delay here. One reason is that I don't really know all
the answers for your problem.

On Thu, Sep 22, 2011 at 3:15 AM, <dhlm83 at sapo.pt> wrote:
> I think the mtd-utils version is the same to kernel 2.4.x and 2.6.x in my
> distro source.
> This can not generate some compatibility issues?

I'm not sure what distro is providing 2.4.x and 2.6.x kernels, but it would
seem to me like recent versions of mtd-utils (I think you're using
"mtd-utils v1.4.2") are not designed to support both kernels. Generally, it
is difficult for today's developers to test code for 2.4.x, and there is no
official support for MTD on 2.4.x. See:

http://www.linux-mtd.infradead.org/source.html#kernelversions

> In the past, mtd-utils have the utilities erase and erase_all. I think that
> utilities work with my kernel, is that possible?
> You know what version of mtd-utils are available (erase and erase_all)?
> I can try this version.

It is possible that some old version of mtd-utils had simpler utilities
that worked with 2.4.x. I don't see them in the git repository, though, so
they're likely older than 2006.

Brian

P.S. It looks like your problem is pretty simple to fix. Try this patch
out, and perhaps it can be integrated into mtd-utils to provide a small
breath of support for 2.4.x in the "legacy" section of libmtd :)

---

From: Brian Norris <computersforpeace at gmail.com>
Subject: [PATCH] libmtd_legacy: support kernels before ioctl(MEMGETBADBLOCK)
 existed

For really old kernels, ioctl(MEMGETBADBLOCK) did not exist, so we
always quit out with ENOTTY. We should at least allow this check to pass
and just proceed without bad block info. This is safe enough, as users
of these old kernels will not be using NAND (or anything with bad
blocks).

Reported-by: Domingos Goncalves <dhlm83 at sapo.pt>
Signed-off-by: Brian Norris <computersforpeace at gmail.com>
---
 lib/libmtd_legacy.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/libmtd_legacy.c b/lib/libmtd_legacy.c
index d6c3938..14a3f27 100644
--- a/lib/libmtd_legacy.c
+++ b/lib/libmtd_legacy.c
@@ -248,7 +248,7 @@ int legacy_get_dev_info(const char *node, struct mtd_dev_info *mtd)
 
 	ret = ioctl(fd, MEMGETBADBLOCK, &offs);
 	if (ret == -1) {
-		if (errno != EOPNOTSUPP) {
+		if (errno != EOPNOTSUPP && errno != ENOTTY) {
 			sys_errmsg("MEMGETBADBLOCK ioctl failed");
 			goto out_close;
 		}
-- 
1.7.5.4