[PATCH v2 4/6] s390/block/dasd_genhd: add error handling support for add_disk()

Luis Chamberlain
2021-09-27T22:29:28Z

Be sure to call dasd_gendisk_free() on error.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
drivers/s390/block/dasd_genhd.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index fa966e0db6ca..80673dbfb1f9 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -33,7 +33,7 @@ int dasd_gendisk_alloc(struct dasd_block *block)
{
struct gendisk *gdp;
struct dasd_device *base;
- int len;
+ int len, rc;

/* Make sure the minor for this device exists. */
base = block->base;
@@ -79,7 +79,13 @@ int dasd_gendisk_alloc(struct dasd_block *block)
dasd_add_link_to_gendisk(gdp, base);
block->gdp = gdp;
set_capacity(block->gdp, 0);
- device_add_disk(&base->cdev->dev, block->gdp, NULL);
+
+ rc = device_add_disk(&base->cdev->dev, block->gdp, NULL);
+ if (rc) {
+ dasd_gendisk_free(block);
+ return rc;
+ }
+
return 0;
}