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MTD: Fix wrong check register_blkdev return value

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register_blkdev return 1..255 when major = 0.

if (ret ) {
	printk(KERN_WARNING "Unable to register %s block device on major %d: %d\n",
		tr->name, tr->major, ret);
	      mutex_unlock(&mtd_table_mutex);
	return ret;
}

Above code will return fail when register_blkdev return allocated major number.

Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Frank Li 2010-10-26 11:02:19 +08:00 committed by David Woodhouse
parent 6411bf6cdf
commit 6fe4c59031
1 changed files with 4 additions and 1 deletions
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5
drivers/mtd/mtd_blkdevs.c
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@ -502,13 +502,16 @@ int register_mtd_blktrans(struct mtd_blktrans_ops *tr)
mutex_lock(&mtd_table_mutex);
ret = register_blkdev(tr->major, tr->name);
if (ret) {
if (ret < 0) {
printk(KERN_WARNING "Unable to register %s block device on major %d: %d\n",
tr->name, tr->major, ret);
mutex_unlock(&mtd_table_mutex);
return ret;
}
if (ret)
tr->major = ret;
tr->blkshift = ffs(tr->blksize) - 1;
INIT_LIST_HEAD(&tr->devs);