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m68k: set proper major_num when specifying module param major_num

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When calling register_blkdev() with specified major
device number, the return code is 0 on success.
So it seems not correct direct assign return code to
variable major_num in this case.

Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chengguang Xu 2019-02-01 11:26:02 +08:00 committed by Jens Axboe
parent dd957493ba
commit 30363d6506
1 changed files with 7 additions and 3 deletions
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10
arch/m68k/emu/nfblock.c
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@ -155,18 +155,22 @@ static int __init nfhd_init_one(int id, u32 blocks, u32 bsize)
static int __init nfhd_init(void)
{
u32 blocks, bsize;
int ret;
int i;
nfhd_id = nf_get_id("XHDI");
if (!nfhd_id)
return -ENODEV;
major_num = register_blkdev(major_num, "nfhd");
if (major_num <= 0) {
ret = register_blkdev(major_num, "nfhd");
if (ret < 0) {
pr_warn("nfhd: unable to get major number\n");
return major_num;
return ret;
}
if (!major_num)
major_num = ret;
for (i = NFHD_DEV_OFFSET; i < 24; i++) {
if (nfhd_get_capacity(i, 0, &blocks, &bsize))
continue;