spl_mmc: cleanup variable types

block_read returns unsigned long, so it doesn't make sense to check for
< 0. and neither does marking the header structure as const and then
casting away the constness to load data into it.

Also cleanup some unneeded pointer casting while we're at it.
Signed-off-by: NPeter Korsgaard <peter.korsgaard@barco.com>
Reviewed-by: NTom Rini <trini@ti.com>

drivers/mmc/spl_mmc.c

@@ -34,8 +34,9 @@ DECLARE_GLOBAL_DATA_PTR;
 
 static void mmc_load_image_raw(struct mmc *mmc)
 {
-	u32 image_size_sectors, err;
-	const struct image_header *header;
+	unsigned long err;
+	u32 image_size_sectors;
+	struct image_header *header;
 
 	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
 						sizeof(struct image_header));
@@ -43,9 +44,9 @@ static void mmc_load_image_raw(struct mmc *mmc)
 	/* read image header to find the image size & load address */
 	err = mmc->block_dev.block_read(0,
 			CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, 1,
-			(void *)header);
+			header);
 
-	if (err <= 0)
+	if (err == 0)
 		goto end;
 
 	spl_parse_image_header(header);
@@ -60,8 +61,8 @@ static void mmc_load_image_raw(struct mmc *mmc)
 			image_size_sectors, (void *)spl_image.load_addr);
 
 end:
-	if (err <= 0) {
-		printf("spl: mmc blk read err - %d\n", err);
+	if (err == 0) {
+		printf("spl: mmc blk read err - %lu\n", err);
 		hang();
 	}
 }
@@ -69,7 +70,7 @@ end:
 #ifdef CONFIG_SPL_FAT_SUPPORT
 static void mmc_load_image_fat(struct mmc *mmc)
 {
-	s32 err;
+	int err;
 	struct image_header *header;
 
 	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
@@ -83,7 +84,7 @@ static void mmc_load_image_fat(struct mmc *mmc)
 	}
 
 	err = file_fat_read(CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME,
-				(u8 *)header, sizeof(struct image_header));
+				header, sizeof(struct image_header));
 	if (err <= 0)
 		goto end;