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s390/dasd: put block allocation in separate function
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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>
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Stefan Haberland authored and Jens Axboe committed Sep 21, 2022
1 parent a7609c6 commit 2b43bf0
Showing 1 changed file with 23 additions and 15 deletions.
38 changes: 23 additions & 15 deletions drivers/s390/block/dasd_eckd.c
Original file line number Diff line number Diff line change
Expand Up @@ -2012,6 +2012,25 @@ 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.
Expand All @@ -2020,8 +2039,6 @@ 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;
Expand Down Expand Up @@ -2079,19 +2096,10 @@ 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);
Expand Down

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