platform/mellanox: mlxbf-bootctl: use sysfs_emit() instead of sprintf()

Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: Ai Chao <aichao@kylinos.cn>
Acked-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20250116080836.2890442-1-aichao@kylinos.cn
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/mellanox/mlxbf-bootctl.c b/drivers/platform/mellanox/mlxbf-bootctl.c
index a2011af48201c6561565920cbac2f18b667c3006..9cae07348d5eb41b92fd868e483128b907c2f911 100644 (file)
--- a/drivers/platform/mellanox/mlxbf-bootctl.c
+++ b/drivers/platform/mellanox/mlxbf-bootctl.c
@@ -177,7 +177,7 @@ static ssize_t post_reset_wdog_show(struct device *dev,
        if (ret < 0)
                return ret;
 
-       return sprintf(buf, "%d\n", ret);
+       return sysfs_emit(buf, "%d\n", ret);
 }
 
 static ssize_t post_reset_wdog_store(struct device *dev,
@@ -206,7 +206,7 @@ static ssize_t mlxbf_bootctl_show(int smc_op, char *buf)
        if (action < 0)
                return action;
 
-       return sprintf(buf, "%s\n", mlxbf_bootctl_action_to_string(action));
+       return sysfs_emit(buf, "%s\n", mlxbf_bootctl_action_to_string(action));
 }
 
 static int mlxbf_bootctl_store(int smc_op, const char *buf, size_t count)
@@ -274,14 +274,14 @@ static ssize_t lifecycle_state_show(struct device *dev,
         * due to using the test bits.
         */
        if (test_state) {
-               return sprintf(buf, "%s(test)\n",
+               return sysfs_emit(buf, "%s(test)\n",
                               mlxbf_bootctl_lifecycle_states[lc_state]);
        } else if (use_dev_key &&
                   (lc_state == MLXBF_BOOTCTL_SB_LIFECYCLE_GA_SECURE)) {
-               return sprintf(buf, "Secured (development)\n");
+               return sysfs_emit(buf, "Secured (development)\n");
        }
 
-       return sprintf(buf, "%s\n", mlxbf_bootctl_lifecycle_states[lc_state]);
+       return sysfs_emit(buf, "%s\n", mlxbf_bootctl_lifecycle_states[lc_state]);
 }
 
 static ssize_t secure_boot_fuse_state_show(struct device *dev,
@@ -332,9 +332,9 @@ static ssize_t secure_boot_fuse_state_show(struct device *dev,
                        else
                                status = valid ? "Invalid" : "Free";
                }
-               buf_len += sprintf(buf + buf_len, "%d:%s ", key, status);
+               buf_len += sysfs_emit(buf + buf_len, "%d:%s ", key, status);
        }
-       buf_len += sprintf(buf + buf_len, "\n");
+       buf_len += sysfs_emit(buf + buf_len, "\n");
 
        return buf_len;
 }