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mtd: fixup corner case error handling in mtd_device_parse_register() 

Since commit 3efe41be22 ("mtd: implement common reboot notifier
boilerplate"), we might try to register a reboot notifier for an MTD
that failed to register. Let's avoid this by making the error path
clearer.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Brian Norris 2015-06-01 16:17:19 -07:00
parent af30c0a00a
commit 3e00ed0e98
1 changed files with 9 additions and 2 deletions
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9
drivers/mtd/mtdcore.c
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@ -588,9 +588,15 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types,
else
ret = nr_parts;
}
/* Didn't come up with either parsed OR fallback partitions */
if (ret < 0) {
pr_info("mtd: failed to find partitions\n");
goto out;
}
if (ret >= 0)
ret = mtd_add_device_partitions(mtd, real_parts, ret);
if (ret)
goto out;
/*
* FIXME: some drivers unfortunately call this function more than once.
@ -605,6 +611,7 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types,
register_reboot_notifier(&mtd->reboot_notifier);
}
out:
kfree(real_parts);
return ret;
}