linux-kernel - [PATCH v16 04/11] fw_cfg: fix sparse warnings around FW_CFG_FILE

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Date:   Wed, 28 Feb 2018 16:06:08 +0100
From:   Marc-André Lureau <marcandre.lureau@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     arnd@...db.de, bhe@...hat.com, slp@...hat.com, mst@...hat.com,
        somlo@....edu, xiaolong.ye@...el.com,
        Marc-André Lureau <marcandre.lureau@...hat.com>
Subject: [PATCH v16 04/11] 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@...hat.com>
---
 drivers/firmware/qemu_fw_cfg.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
index 0eb155fdfb35..00ad9b862414 100644
--- a/drivers/firmware/qemu_fw_cfg.c
+++ b/drivers/firmware/qemu_fw_cfg.c
@@ -496,19 +496,20 @@ static int fw_cfg_register_file(const struct fw_cfg_file *f)
 static int fw_cfg_register_dir_entries(void)
 {
 	int ret = 0;
+	__be32 files_count;
 	u32 count, i;
 	struct fw_cfg_file *dir;
 	size_t dir_size;
 
-	fw_cfg_read_blob(FW_CFG_FILE_DIR, &count, 0, sizeof(count));
-	count = be32_to_cpu(count);
+	fw_cfg_read_blob(FW_CFG_FILE_DIR, &files_count, 0, sizeof(files_count));
+	count = be32_to_cpu(files_count);
 	dir_size = count * sizeof(struct fw_cfg_file);
 
 	dir = kmalloc(dir_size, GFP_KERNEL);
 	if (!dir)
 		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++) {
 		ret = fw_cfg_register_file(&dir[i]);
-- 
2.16.1.73.g5832b7e9f2