[PATCH] board: libre-computer: check interface before comparing it in set_dfu_alt_info()

[Neil Armstrong]

When set_dfu_alt_info() is called, interface can be NULL when called for
the EFI capsule, so check it before calling it with strcmp().

Fixes: 12ea40d29dc ("ARM: meson: add support for Libre Computer aml-s905d3-cc")
Fixes: 9e6e6b034b1 ("ARM: meson: add support for Libre Computer aml-a311d-cc")
Fixes: 75c87c6cbc0 ("board: libre-computer: aml-s805x-cc: Enable capsule 
updates")
Signed-off-by: Neil Armstrong <neil.armstr...@linaro.org>
---
 board/libre-computer/aml-a311d-cc/aml-a311d-cc.c   | 2 +-
 board/libre-computer/aml-s805x-ac/aml-s805x-ac.c   | 2 +-
 board/libre-computer/aml-s905d3-cc/aml-s905d3-cc.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/board/libre-computer/aml-a311d-cc/aml-a311d-cc.c 
b/board/libre-computer/aml-a311d-cc/aml-a311d-cc.c
index 
e45cfd5d8a3885683dd6b1d0eea03084dc6dfdb5..294f78858a7848fe8255c9b9b42e2f556a6e05d1
 100644
--- a/board/libre-computer/aml-a311d-cc/aml-a311d-cc.c
+++ b/board/libre-computer/aml-a311d-cc/aml-a311d-cc.c
@@ -29,7 +29,7 @@ struct efi_capsule_update_info update_info = {
 #if IS_ENABLED(CONFIG_SET_DFU_ALT_INFO)
 void set_dfu_alt_info(char *interface, char *devstr)
 {
-       if (strcmp(interface, "ram") == 0)
+       if (interface && strcmp(interface, "ram") == 0)
                env_set("dfu_alt_info", "fitimage ram 0x08080000 0x4000000");
        else if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT))
                env_set("dfu_alt_info", update_info.dfu_string);
diff --git a/board/libre-computer/aml-s805x-ac/aml-s805x-ac.c 
b/board/libre-computer/aml-s805x-ac/aml-s805x-ac.c
index 
94cf5b4361fac5003dded2f8dc2bfc9be7630099..1ec9a5b401e210045f1b13720f1e5c16e1f7f86b
 100644
--- a/board/libre-computer/aml-s805x-ac/aml-s805x-ac.c
+++ b/board/libre-computer/aml-s805x-ac/aml-s805x-ac.c
@@ -36,7 +36,7 @@ struct efi_capsule_update_info update_info = {
 #if IS_ENABLED(CONFIG_SET_DFU_ALT_INFO)
 void set_dfu_alt_info(char *interface, char *devstr)
 {
-       if (strcmp(interface, "ram") == 0)
+       if (interface && strcmp(interface, "ram") == 0)
                env_set("dfu_alt_info", "fitimage ram 0x08080000 0x4000000");
        else if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT))
                env_set("dfu_alt_info", update_info.dfu_string);
diff --git a/board/libre-computer/aml-s905d3-cc/aml-s905d3-cc.c 
b/board/libre-computer/aml-s905d3-cc/aml-s905d3-cc.c
index 
f641db5a494f358ed89591fae06e66eb18f85709..b552035ee03a7b848455ae6564688b4a12e02326
 100644
--- a/board/libre-computer/aml-s905d3-cc/aml-s905d3-cc.c
+++ b/board/libre-computer/aml-s905d3-cc/aml-s905d3-cc.c
@@ -29,7 +29,7 @@ struct efi_capsule_update_info update_info = {
 #if IS_ENABLED(CONFIG_SET_DFU_ALT_INFO)
 void set_dfu_alt_info(char *interface, char *devstr)
 {
-       if (strcmp(interface, "ram") == 0)
+       if (interface && strcmp(interface, "ram") == 0)
                env_set("dfu_alt_info", "fitimage ram 0x08080000 0x4000000");
        else if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT))
                env_set("dfu_alt_info", update_info.dfu_string);

---
base-commit: f59fb9846c5a1d129f78b2945a094477388fd346
change-id: 20250403-u-boot-fix-set-dfu-alt-info-interface-9be8ea5e2bc1

Best regards,
-- 
Neil Armstrong <neil.armstr...@linaro.org>