scsi: tcmu: use match_int for dev params

Instead of doing strdup and kstrto* just use match_int for dev params.

It will be ok to use int instead of unsigned long in tcmu_set_dev_attrib
because that is only being used for max sectors and block size and the
supported values for them are well under the max possible integer value.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c
index 969ccbaaccba5739b78ba77d229323f8a97ace93..cfe4f4b8c45cc41ab51b8f77b715bff3e0260986 100644 (file)
--- a/drivers/target/target_core_user.c
+++ b/drivers/target/target_core_user.c
@@ -2017,8 +2017,8 @@ enum {
 static match_table_t tokens = {
        {Opt_dev_config, "dev_config=%s"},
        {Opt_dev_size, "dev_size=%u"},
-       {Opt_hw_block_size, "hw_block_size=%u"},
-       {Opt_hw_max_sectors, "hw_max_sectors=%u"},
+       {Opt_hw_block_size, "hw_block_size=%d"},
+       {Opt_hw_max_sectors, "hw_max_sectors=%d"},
        {Opt_nl_reply_supported, "nl_reply_supported=%d"},
        {Opt_max_data_area_mb, "max_data_area_mb=%d"},
        {Opt_err, NULL}
@@ -2026,25 +2026,21 @@ static match_table_t tokens = {
 
 static int tcmu_set_dev_attrib(substring_t *arg, u32 *dev_attrib)
 {
-       unsigned long tmp_ul;
-       char *arg_p;
-       int ret;
-
-       arg_p = match_strdup(arg);
-       if (!arg_p)
-               return -ENOMEM;
+       int val, ret;
 
-       ret = kstrtoul(arg_p, 0, &tmp_ul);
-       kfree(arg_p);
+       ret = match_int(arg, &val);
        if (ret < 0) {
-               pr_err("kstrtoul() failed for dev attrib\n");
+               pr_err("match_int() failed for dev attrib. Error %d.\n",
+                      ret);
                return ret;
        }
-       if (!tmp_ul) {
-               pr_err("dev attrib must be nonzero\n");
+
+       if (val <= 0) {
+               pr_err("Invalid dev attrib value %d. Must be greater than zero.\n",
+                      val);
                return -EINVAL;
        }
-       *dev_attrib = tmp_ul;
+       *dev_attrib = val;
        return 0;
 }
 
@@ -2131,15 +2127,10 @@ static ssize_t tcmu_set_configfs_dev_params(struct se_device *dev,
                                        &(dev->dev_attrib.hw_max_sectors));
                        break;
                case Opt_nl_reply_supported:
-                       arg_p = match_strdup(&args[0]);
-                       if (!arg_p) {
-                               ret = -ENOMEM;
-                               break;
-                       }
-                       ret = kstrtoint(arg_p, 0, &udev->nl_reply_supported);
-                       kfree(arg_p);
+                       ret = match_int(&args[0], &udev->nl_reply_supported);
                        if (ret < 0)
-                               pr_err("kstrtoint() failed for nl_reply_supported=\n");
+                               pr_err("match_int() failed for nl_reply_supported=. Error %d.\n",
+                                      ret);
                        break;
                case Opt_max_data_area_mb:
                        ret = tcmu_set_max_blocks_param(udev, &args[0]);