Hi Michael,

On Fri, 26 Jul 2024 at 17:00, Michael Walle mwalle@kernel.org wrote:

android_image_get_ramdisk() will return an error if there is no ramdisk. Using the android image without a ramdisk worked until commit 1ce8e10f3b4b ("image: Fix up ANDROID_BOOT_IMAGE ramdisk code") because that return code wasn't checked. Now that it is checked, don't return an error in the (valid) case that there is no ramdisk in the image.

With this, I'm able to boot a linux kernel using fastboot again:

fastboot --base 0x41000000 --header-version 2 --dtb /path/to/dtb \ --cmdline "root=/dev/mmcblk0p1 rootwait" boot path/to/Image

Signed-off-by: Michael Walle mwalle@kernel.org

boot/image-android.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/boot/image-android.c b/boot/image-android.c index 09c7a44e058..0900579ee8c 100644 --- a/boot/image-android.c +++ b/boot/image-android.c @@ -395,7 +395,7 @@ int android_image_get_ramdisk(const void *hdr, const void *vendor_boot_img,

    if (!img_data.ramdisk_size) {
            *rd_data = *rd_len = 0;

•           return -1;
  

•           return 0;
    }
    if (img_data.header_version > 2) {
            ramdisk_ptr = img_data.ramdisk_addr;
  

-- 2.39.2

Rather than squashing the information here, you should return a value that indicates there is no ramdisk. Normally in U-Boot this is -ENOENT. Then the caller can check it. Also please update the function docs in the header.

I see that -EINVAL is returned for some other error, so the caller should be careful to just allow -ENOENT.

Regards, Simon