diff options
| author | Sunil V L <sunilvl@ventanamicro.com> | 2022-01-28 10:20:04 +0530 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2022-02-28 10:07:49 +0100 |
| commit | dcf0c838854c86e1f41fb1934aea906845d69782 (patch) | |
| tree | 18bd829d9db910ffec9a759b4114f52988eb1596 /drivers/firmware | |
| parent | f5390cd0b43c2e54c7cf5506c7da4a37c5cef746 (diff) | |
| download | linux-dcf0c838854c86e1f41fb1934aea906845d69782.tar.bz2 | |
riscv/efi_stub: Fix get_boot_hartid_from_fdt() return value
The get_boot_hartid_from_fdt() function currently returns U32_MAX
for failure case which is not correct because U32_MAX is a valid
hartid value. This patch fixes the issue by returning error code.
Cc: <stable@vger.kernel.org>
Fixes: d7071743db31 ("RISC-V: Add EFI stub support.")
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/libstub/riscv-stub.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/firmware/efi/libstub/riscv-stub.c b/drivers/firmware/efi/libstub/riscv-stub.c index 380e4e251399..9c460843442f 100644 --- a/drivers/firmware/efi/libstub/riscv-stub.c +++ b/drivers/firmware/efi/libstub/riscv-stub.c @@ -25,7 +25,7 @@ typedef void __noreturn (*jump_kernel_func)(unsigned int, unsigned long); static u32 hartid; -static u32 get_boot_hartid_from_fdt(void) +static int get_boot_hartid_from_fdt(void) { const void *fdt; int chosen_node, len; @@ -33,23 +33,26 @@ static u32 get_boot_hartid_from_fdt(void) fdt = get_efi_config_table(DEVICE_TREE_GUID); if (!fdt) - return U32_MAX; + return -EINVAL; chosen_node = fdt_path_offset(fdt, "/chosen"); if (chosen_node < 0) - return U32_MAX; + return -EINVAL; prop = fdt_getprop((void *)fdt, chosen_node, "boot-hartid", &len); if (!prop || len != sizeof(u32)) - return U32_MAX; + return -EINVAL; - return fdt32_to_cpu(*prop); + hartid = fdt32_to_cpu(*prop); + return 0; } efi_status_t check_platform_features(void) { - hartid = get_boot_hartid_from_fdt(); - if (hartid == U32_MAX) { + int ret; + + ret = get_boot_hartid_from_fdt(); + if (ret) { efi_err("/chosen/boot-hartid missing or invalid!\n"); return EFI_UNSUPPORTED; } |