spl: spl_legacy: Fix NAND boot on OMAP3 BeagleBoard

OMAP3 BeagleBoard NAND boot hangs when spl_load_legacy_img() tries
to read the header into 'struct hdr' which is allocated on the
stack.

As the header has already been read once before by spl_nand.c,
we can avoid the extra header allocation and read here by
simply passing around the pointer to the header.

This fixes NAND boot on OMAP3 BeagleBoard.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-By: Michael Trimarchi <michael@amarulasolutions.com>
diff --git a/common/spl/spl_legacy.c b/common/spl/spl_legacy.c
index b3624df..4c7f446 100644
--- a/common/spl/spl_legacy.c
+++ b/common/spl/spl_legacy.c
@@ -77,32 +77,29 @@
 
 int spl_load_legacy_img(struct spl_image_info *spl_image,
 			struct spl_boot_device *bootdev,
-			struct spl_load_info *load, ulong header)
+			struct spl_load_info *load, ulong offset,
+			struct legacy_img_hdr *hdr)
 {
 	__maybe_unused SizeT lzma_len;
 	__maybe_unused void *src;
-	struct legacy_img_hdr hdr;
 	ulong dataptr;
 	int ret;
 
-	/* Read header into local struct */
-	load->read(load, header, sizeof(hdr), &hdr);
-
 	/*
 	 * If the payload is compressed, the decompressed data should be
 	 * directly write to its load address.
 	 */
-	if (spl_image_get_comp(&hdr) != IH_COMP_NONE)
+	if (spl_image_get_comp(hdr) != IH_COMP_NONE)
 		spl_image->flags |= SPL_COPY_PAYLOAD_ONLY;
 
-	ret = spl_parse_image_header(spl_image, bootdev, &hdr);
+	ret = spl_parse_image_header(spl_image, bootdev, hdr);
 	if (ret)
 		return ret;
 
 	/* Read image */
-	switch (spl_image_get_comp(&hdr)) {
+	switch (spl_image_get_comp(hdr)) {
 	case IH_COMP_NONE:
-		dataptr = header;
+		dataptr = offset;
 
 		/*
 		 * Image header will be skipped only if SPL_COPY_PAYLOAD_ONLY
@@ -119,7 +116,7 @@
 		lzma_len = LZMA_LEN;
 
 		/* dataptr points to compressed payload  */
-		dataptr = header + sizeof(hdr);
+		dataptr = offset + sizeof(hdr);
 
 		debug("LZMA: Decompressing %08lx to %08lx\n",
 		      dataptr, spl_image->load_addr);
@@ -143,7 +140,7 @@
 
 	default:
 		debug("Compression method %s is not supported\n",
-		      genimg_get_comp_short_name(image_get_comp(&hdr)));
+		      genimg_get_comp_short_name(image_get_comp(hdr)));
 		return -EINVAL;
 	}