On Tue, Nov 10, 2020 at 07:04:18PM -0600, Mike Travis wrote:
> A test shows that the output contains a space:
> # cat /proc/sgi_uv/archtype
> NSGI4 U/UVX
> Remove that embedded space by copying the "trimmed" buffer instead of the
> untrimmed input character list. Use sizeof to remove size dependency
> on copy out length. Increase output buffer size by one character just
> in case BIOS sends an 8 character string for archtype.
>
> Fixes: 1e61f5a95f191 (Add and decode Arch Type in UVsystab)
>
> Signed-off-by: Mike Travis
Reviewed-by: Steve Wahl
> ---
> arch/x86/kernel/apic/x2apic_uv_x.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c
> b/arch/x86/kernel/apic/x2apic_uv_x.c
> index 3115caa7d7d0..1b98f8c12b96 100644
> --- a/arch/x86/kernel/apic/x2apic_uv_x.c
> +++ b/arch/x86/kernel/apic/x2apic_uv_x.c
> @@ -33,7 +33,7 @@ static union uvh_apicid uvh_apicid;
> static int uv_node_id;
>
> /* Unpack AT/OEM/TABLE ID's to be NULL terminated strings */
> -static u8 uv_archtype[UV_AT_SIZE];
> +static u8 uv_archtype[UV_AT_SIZE + 1];
> static u8 oem_id[ACPI_OEM_ID_SIZE + 1];
> static u8 oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1];
>
> @@ -320,7 +320,7 @@ static int __init decode_arch_type(unsigned long ptr)
>
> if (n > 0 && n < sizeof(uv_ate->archtype)) {
> pr_info("UV: UVarchtype received from BIOS\n");
> - uv_stringify(UV_AT_SIZE, uv_archtype, uv_ate->archtype);
> + uv_stringify(sizeof(uv_archtype), uv_archtype,
> uv_ate->archtype);
> return 1;
> }
> return 0;
> @@ -378,7 +378,7 @@ static int __init uv_set_system_type(char *_oem_id, char
> *_oem_table_id)
> if (!early_get_arch_type())
>
> /* If not use OEM ID for UVarchtype */
> - uv_stringify(UV_AT_SIZE, uv_archtype, _oem_id);
> + uv_stringify(sizeof(uv_archtype), uv_archtype, oem_id);
>
> /* Check if not hubbed */
> if (strncmp(uv_archtype, "SGI", 3) != 0) {
> --
> 2.21.0
>
--
Steve Wahl, Hewlett Packard Enterprise
