[U-Boot] [PATCH] efi_loader: device_path: allow for arbitrary length of file path

[AKASHI Takahiro]

This patch will lift the upper limit of maximum path length.

Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
---
 lib/efi_loader/efi_device_path.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 86297bb7c116..13a2b5e29db1 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -1017,8 +1017,7 @@ efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
 	struct blk_desc *desc = NULL;
 	disk_partition_t fs_partition;
 	int part = 0;
-	char filename[32] = { 0 }; /* dp->str is u16[32] long */
-	char *s;
+	char *filename, *s;
 
 	if (path && !file)
 		return EFI_INVALID_PARAMETER;
@@ -1042,13 +1041,16 @@ efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
 	if (!path)
 		return EFI_SUCCESS;
 
-	snprintf(filename, sizeof(filename), "%s", path);
+	filename = strdup(path);
+	if (!filename)
+		return EFI_OUT_OF_RESOURCES;
 	/* DOS style file path: */
 	s = filename;
 	while ((s = strchr(s, '/')))
 		*s++ = '\\';
 	*file = efi_dp_from_file(((!is_net && device) ? desc : NULL),
 				 part, filename);
+	free(filename);
 
 	return EFI_SUCCESS;
 }
-- 
2.21.0