fw_cfg: fix sparse warning reading FW_CFG_ID

Use a restricted type for reading FW_CFG_ID, fixing sparse warning:

drivers/firmware/qemu_fw_cfg.c:540:22: warning: cast to restricted __le32

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
index 7978844f6b37..0eb155fdfb35 100644
--- a/drivers/firmware/qemu_fw_cfg.c
+++ b/drivers/firmware/qemu_fw_cfg.c
@@ -530,6 +530,7 @@ static inline void fw_cfg_kobj_cleanup(struct kobject *kobj)
 static int fw_cfg_sysfs_probe(struct platform_device *pdev)
 {
         int err;
+        __le32 rev;
 
         /* NOTE: If we supported multiple fw_cfg devices, we'd first create
          * a subdirectory named after e.g. pdev->id, then hang per-device
@@ -555,8 +556,8 @@ static int fw_cfg_sysfs_probe(struct platform_device *pdev)
                 goto err_probe;
 
         /* get revision number, add matching top-level attribute */
-        fw_cfg_read_blob(FW_CFG_ID, &fw_cfg_rev, 0, sizeof(fw_cfg_rev));
-        fw_cfg_rev = le32_to_cpu(fw_cfg_rev);
+        fw_cfg_read_blob(FW_CFG_ID, &rev, 0, sizeof(rev));
+        fw_cfg_rev = le32_to_cpu(rev);
         err = sysfs_create_file(fw_cfg_top_ko, &fw_cfg_rev_attr.attr);
         if (err)
                 goto err_rev;