The branch main has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=462af7676b3ee8a8bd9ee9b55a35c0cf815a351f
commit 462af7676b3ee8a8bd9ee9b55a35c0cf815a351f Author: Warner Losh <[email protected]> AuthorDate: 2024-03-11 20:15:44 +0000 Commit: Warner Losh <[email protected]> CommitDate: 2024-03-11 21:21:52 +0000 kboot: kbootfdt: fix error handling If we are able to open /sys/firmware/fdt, but aren't able to read it, fall back to /proc/device-tree. Remove comment that's not really true, it turns out. Sponsored by: Netflix --- stand/kboot/kboot/kbootfdt.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/stand/kboot/kboot/kbootfdt.c b/stand/kboot/kboot/kbootfdt.c index 70844820d345..e4c378423585 100644 --- a/stand/kboot/kboot/kbootfdt.c +++ b/stand/kboot/kboot/kbootfdt.c @@ -91,22 +91,21 @@ fdt_platform_load_dtb(void) { void *buffer; size_t buflen = 409600; - int fd; + int fd, err = 0; /* * Should load /sys/firmware/fdt if it exists, otherwise we walk the * tree from /proc/device-tree. The former is much easier than the * latter and also the newer interface. But as long as we support the - * PS3 boot, we'll need the latter due to that kernel's age. It likely - * would be better to script the decision between the two, but that - * turns out to be tricky... + * PS3 boot, we'll need the latter due to that kernel's age. */ buffer = malloc(buflen); fd = host_open("/sys/firmware/fdt", O_RDONLY, 0); - if (fd != -1) { - buflen = host_read(fd, buffer, buflen); + if (fd >= 0) { + err = host_read(fd, buffer, buflen); close(fd); - } else { + } + if (fd < 0 || err < 0) { fdt_create_empty_tree(buffer, buflen); add_node_to_fdt(buffer, "/proc/device-tree", fdt_path_offset(buffer, "/"));
