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fw_cfg: fix sparse warnings around FW_CFG_FILE_DIR read 

Use struct fw_cfg_files to read the directory size, fixing the sparse
warnings:

drivers/firmware/qemu_fw_cfg.c:485:17: warning: cast to restricted __be32

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-02-28 16:06:08 +01:00 committed by Michael S. Tsirkin
parent f295c8dba7
commit 3d47a34ba6
1 changed files with 4 additions and 3 deletions
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7
drivers/firmware/qemu_fw_cfg.c
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@ -496,19 +496,20 @@ err_register:
static int fw_cfg_register_dir_entries(void) static int fw_cfg_register_dir_entries(void)
{ {
int ret = 0; int ret = 0;
__be32 files_count;
u32 count, i; u32 count, i;
struct fw_cfg_file *dir; struct fw_cfg_file *dir;
size_t dir_size; size_t dir_size;
fw_cfg_read_blob(FW_CFG_FILE_DIR, &count, 0, sizeof(count)); fw_cfg_read_blob(FW_CFG_FILE_DIR, &files_count, 0, sizeof(files_count));
count = be32_to_cpu(count); count = be32_to_cpu(files_count);
dir_size = count * sizeof(struct fw_cfg_file); dir_size = count * sizeof(struct fw_cfg_file);
dir = kmalloc(dir_size, GFP_KERNEL); dir = kmalloc(dir_size, GFP_KERNEL);
if (!dir) if (!dir)
return -ENOMEM; return -ENOMEM;
fw_cfg_read_blob(FW_CFG_FILE_DIR, dir, sizeof(count), dir_size); fw_cfg_read_blob(FW_CFG_FILE_DIR, dir, sizeof(files_count), dir_size);
for (i = 0; i < count; i++) { for (i = 0; i < count; i++) {
ret = fw_cfg_register_file(&dir[i]); ret = fw_cfg_register_file(&dir[i]);