image: fix bootm failure for FIT image

Commit b3dd64f5d5 "bootm: use genimg_get_kernel_addr()" introduced
a bug for booting FIT image. It's because calling fit_parse_config()
twice will give us wrong value in img_addr.

Add a new function genimg_get_kernel_addr_fit() whichl will always
return fit_uname_config and fit_uname_kernel for CONFIG_FIT.
genimg_get_kernel_addr() will ignore those to parameters.

Reported-by: York Sun <yorksun@freescale.com>
Signed-off-by: Bryan Wu <pengw@nvidia.com>

common/bootm.c

@@ -725,13 +725,14 @@ static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
 #endif
 	ulong		img_addr;
 	const void *buf;
-#if defined(CONFIG_FIT)
 	const char	*fit_uname_config = NULL;
 	const char	*fit_uname_kernel = NULL;
+#if defined(CONFIG_FIT)
 	int		os_noffset;
 #endif
 
-	img_addr = genimg_get_kernel_addr(argv[0]);
+	img_addr = genimg_get_kernel_addr_fit(argv[0], &fit_uname_config,
+					  &fit_uname_kernel);
 
 	bootstage_mark(BOOTSTAGE_ID_CHECK_MAGIC);
 
@@ -788,10 +789,6 @@ static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
 #endif
 #if defined(CONFIG_FIT)
 	case IMAGE_FORMAT_FIT:
-		if (!fit_parse_conf(argv[0], load_addr, &img_addr,
-					&fit_uname_config))
-			fit_parse_subimage(argv[0], load_addr, &img_addr,
-					&fit_uname_kernel);
 		os_noffset = fit_image_load(images, img_addr,
 				&fit_uname_kernel, &fit_uname_config,
 				IH_ARCH_DEFAULT, IH_TYPE_KERNEL,

common/image.c

@@ -643,22 +643,24 @@ int genimg_get_comp_id(const char *name)
 
 #ifndef USE_HOSTCC
 /**
- * genimg_get_kernel_addr - get the real kernel address
+ * genimg_get_kernel_addr_fit - get the real kernel address and return 2
+ *                              FIT strings
  * @img_addr: a string might contain real image address
+ * @fit_uname_config: double pointer to a char, will hold pointer to a
+ *                    configuration unit name
+ * @fit_uname_kernel: double pointer to a char, will hold pointer to a subimage
+ *                    name
  *
- * genimg_get_kernel_addr() get the real kernel start address from a string
+ * genimg_get_kernel_addr_fit get the real kernel start address from a string
  * which is normally the first argv of bootm/bootz
  *
  * returns:
  *     kernel start address
  */
-ulong genimg_get_kernel_addr(char * const img_addr)
+ulong genimg_get_kernel_addr_fit(char * const img_addr,
+			     const char **fit_uname_config,
+			     const char **fit_uname_kernel)
 {
-#if defined(CONFIG_FIT)
-	const char	*fit_uname_config = NULL;
-	const char	*fit_uname_kernel = NULL;
-#endif
-
 	ulong kernel_addr;
 
 	/* find out kernel image address */
@@ -668,13 +670,13 @@ ulong genimg_get_kernel_addr(char * const img_addr)
 		      load_addr);
 #if defined(CONFIG_FIT)
 	} else if (fit_parse_conf(img_addr, load_addr, &kernel_addr,
-				  &fit_uname_config)) {
+				  fit_uname_config)) {
 		debug("*  kernel: config '%s' from image at 0x%08lx\n",
-		      fit_uname_config, kernel_addr);
+		      *fit_uname_config, kernel_addr);
 	} else if (fit_parse_subimage(img_addr, load_addr, &kernel_addr,
-				     &fit_uname_kernel)) {
+				     fit_uname_kernel)) {
 		debug("*  kernel: subimage '%s' from image at 0x%08lx\n",
-		      fit_uname_kernel, kernel_addr);
+		      *fit_uname_kernel, kernel_addr);
 #endif
 	} else {
 		kernel_addr = simple_strtoul(img_addr, NULL, 16);
@@ -686,6 +688,19 @@ ulong genimg_get_kernel_addr(char * const img_addr)
 }
 
 /**
+ * genimg_get_kernel_addr() is the simple version of
+ * genimg_get_kernel_addr_fit(). It ignores those return FIT strings
+ */
+ulong genimg_get_kernel_addr(char * const img_addr)
+{
+	const char *fit_uname_config = NULL;
+	const char *fit_uname_kernel = NULL;
+
+	return genimg_get_kernel_addr_fit(img_addr, &fit_uname_config,
+					  &fit_uname_kernel);
+}
+
+/**
  * genimg_get_format - get image format type
  * @img_addr: image start address
  *

include/image.h

@@ -424,6 +424,9 @@ enum fit_load_op {
 #define IMAGE_FORMAT_FIT	0x02	/* new, libfdt based format */
 #define IMAGE_FORMAT_ANDROID	0x03	/* Android boot image */
 
+ulong genimg_get_kernel_addr_fit(char * const img_addr,
+			         const char **fit_uname_config,
+			         const char **fit_uname_kernel);
 ulong genimg_get_kernel_addr(char * const img_addr);
 int genimg_get_format(const void *img_addr);
 int genimg_has_config(bootm_headers_t *images);