From: Frank Li Date: Tue, 26 Oct 2010 03:02:19 +0000 (+0800) Subject: MTD: Fix wrong check register_blkdev return value X-Git-Tag: v5.15~27566^2~3 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=6fe4c590313133ebd5dadb769031489ff178ece1;p=mirror_ubuntu-kernels.git MTD: Fix wrong check register_blkdev return value 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 Signed-off-by: David Woodhouse --- diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index a919587ed481..63790e975d20 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -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);