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authorzhengbin <zhengbin13@huawei.com>2019-08-13 19:23:12 +0800
committerJens Axboe <axboe@kernel.dk>2019-09-04 07:04:37 -0600
commit03754ea361826fd477d7824ea75ad9e42df1580d (patch)
treedbc9da4498d452c697d49b260b871af42cf40be7 /drivers/block/paride
parentd821cce8ac4625ceecabb9c9e2420daaf41d41d8 (diff)
paride/pcd: need to check if cd->disk is null in pcd_detect
If alloc_disk fails in pcd_init_units, cd->disk & pi are empty, we need to check if cd->disk is null in pcd_detect. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/paride')
-rw-r--r--drivers/block/paride/pcd.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
index bfca80dde7db..636bfea2de6f 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -723,9 +723,9 @@ static int pcd_detect(void)
k = 0;
if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
cd = pcd;
- if (pi_init(cd->pi, 1, -1, -1, -1, -1, -1, pcd_buffer,
- PI_PCD, verbose, cd->name)) {
- if (!pcd_probe(cd, -1, id) && cd->disk) {
+ if (cd->disk && pi_init(cd->pi, 1, -1, -1, -1, -1, -1,
+ pcd_buffer, PI_PCD, verbose, cd->name)) {
+ if (!pcd_probe(cd, -1, id)) {
cd->present = 1;
k++;
} else
@@ -736,11 +736,13 @@ static int pcd_detect(void)
int *conf = *drives[unit];
if (!conf[D_PRT])
continue;
+ if (!cd->disk)
+ continue;
if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD],
conf[D_UNI], conf[D_PRO], conf[D_DLY],
pcd_buffer, PI_PCD, verbose, cd->name))
continue;
- if (!pcd_probe(cd, conf[D_SLV], id) && cd->disk) {
+ if (!pcd_probe(cd, conf[D_SLV], id)) {
cd->present = 1;
k++;
} else