[PATCH 5.15 033/317] s390/dasd: put block allocation in separate function

Sasha Levin
2024-03-24T23:35:32Z

From: Stefan Haberland <sth@linux.ibm.com>

[ Upstream commit 2b43bf061b2e1b67561cbb1f6f305421f5fc86af ]

Put block allocation into a separate function to put some copy pair logic
in it in a later patch.

Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20220920192616.808070-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: c3116e62ddef ("s390/dasd: fix double module refcount decrement")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/s390/block/dasd_eckd.c | 38 ++++++++++++++++++++--------------
1 file changed, 23 insertions(+), 15 deletions(-)

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 56ab74aa07f42..cf80db7a74a3d 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2028,6 +2028,25 @@ static void dasd_eckd_kick_validate_server(struct dasd_device *device)
dasd_put_device(device);
}

+static int dasd_eckd_alloc_block(struct dasd_device *device)
+{
+ struct dasd_block *block;
+ struct dasd_uid temp_uid;
+
+ dasd_eckd_get_uid(device, &temp_uid);
+ if (temp_uid.type == UA_BASE_DEVICE) {
+ block = dasd_alloc_block();
+ if (IS_ERR(block)) {
+ DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+ "could not allocate dasd block structure");
+ return PTR_ERR(block);
+ }
+ device->block = block;
+ block->base = device;
+ }
+ return 0;
+}
+
/*
* Check device characteristics.
* If the device is accessible using ECKD discipline, the device is enabled.
@@ -2036,8 +2055,6 @@ static int
dasd_eckd_check_characteristics(struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
- struct dasd_block *block;
- struct dasd_uid temp_uid;
int rc, i;
int readonly;
unsigned long value;
@@ -2095,19 +2112,10 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
device->default_expires = value;
}

- dasd_eckd_get_uid(device, &temp_uid);
- if (temp_uid.type == UA_BASE_DEVICE) {
- block = dasd_alloc_block();
- if (IS_ERR(block)) {
- DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
- "could not allocate dasd "
- "block structure");
- rc = PTR_ERR(block);
- goto out_err1;
- }
- device->block = block;
- block->base = device;
- }
+ /* check if block device is needed and allocate in case */
+ rc = dasd_eckd_alloc_block(device);
+ if (rc)
+ goto out_err1;

/* register lcu with alias handling, enable PAV */
rc = dasd_alias_make_device_known_to_lcu(device);
--
2.43.0