[PATCH v5 1/8] bootstd: Tweak bootflow logic for device tree

[Simon Glass]

We should only store the FDT filename if we were unable to determine one.
Adjust the logic for this.

This corrects the case where no FDT is needed to boot, such as with EFI
using ACPI.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v5:
- Add new patch to tweak bootflow logic for device tree

 boot/bootmeth_efi.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/boot/bootmeth_efi.c b/boot/bootmeth_efi.c
index 6a97ac02ff5c..d7e042cf01ee 100644
--- a/boot/bootmeth_efi.c
+++ b/boot/bootmeth_efi.c
@@ -235,21 +235,21 @@ static int distro_efi_read_bootflow_file(struct udevice *dev,
 
 	/* try the various available names */
 	ret = -ENOENT;
-	for (seq = 0; ret; seq++) {
+	*fname = '\0';
+	for (seq = 0; ret == -ENOENT; seq++) {
 		ret = distro_efi_get_fdt_name(fname, sizeof(fname), seq);
-		if (ret == -EALREADY) {
+		if (ret == -EALREADY)
 			bflow->flags = BOOTFLOWF_USE_PRIOR_FDT;
-			break;
-		}
-		if (ret)
-			return log_msg_ret("nam", ret);
-		ret = bootmeth_common_read_file(dev, bflow, fname, fdt_addr,
-						&size);
+		if (!ret)
+			ret = bootmeth_common_read_file(dev, bflow, fname,
+							fdt_addr, &size);
 	}
 
-	bflow->fdt_fname = strdup(fname);
-	if (!bflow->fdt_fname)
-		return log_msg_ret("fil", -ENOMEM);
+	if (*fname) {
+		bflow->fdt_fname = strdup(fname);
+		if (!bflow->fdt_fname)
+			return log_msg_ret("fil", -ENOMEM);
+	}
 
 	if (!ret) {
 		bflow->fdt_size = size;
-- 
2.40.0.348.gf938b09366-goog