s390/zcrypt: utilize dev_set_name() ability to use a formatted string

With the dev_set_name() prototype it's not obvious that it takes
a formatted string as a parameter. Use its facility instead of
duplicating the same with strncpy()/snprintf() calls.

With this, also prevent return error code to be shadowed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230831110000.24279-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 6b99f7d..ce04caa 100644 (file)
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -366,7 +366,6 @@ static int zcdn_create(const char *name)
 {
        dev_t devt;
        int i, rc = 0;
-       char nodename[ZCDN_MAX_NAME];
        struct zcdn_device *zcdndev;
 
        if (mutex_lock_interruptible(&ap_perms_mutex))
@@ -407,14 +406,11 @@ static int zcdn_create(const char *name)
        zcdndev->device.devt = devt;
        zcdndev->device.groups = zcdn_dev_attr_groups;
        if (name[0])
-               strncpy(nodename, name, sizeof(nodename));
+               rc = dev_set_name(&zcdndev->device, "%s", name);
        else
-               snprintf(nodename, sizeof(nodename),
-                        ZCRYPT_NAME "_%d", (int)MINOR(devt));
-       nodename[sizeof(nodename) - 1] = '\0';
-       if (dev_set_name(&zcdndev->device, nodename)) {
+               rc = dev_set_name(&zcdndev->device, ZCRYPT_NAME "_%d", (int)MINOR(devt));
+       if (rc) {
                kfree(zcdndev);
-               rc = -EINVAL;
                goto unlockout;
        }
        rc = device_register(&zcdndev->device);