diff options
| author | Andrew Jones | 2023-04-27 18:36:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-05-11 23:03:04 +0900 |
| commit | ccfe86622082fcd352c2935825226f23b422ab8f (patch) | |
| tree | 15d7cc15a5b82d5ac3e24c3f8c374d45cfec8f3f /drivers/perf | |
| parent | f8076d2a7fcee64cb417c2c41ce19d1f652ab38f (diff) | |
RISC-V: Align SBI probe implementation with spec
commit 41cad8284d5e6bf1d49d3c10a6b52ee1ae866a20 upstream.
sbi_probe_extension() is specified with "Returns 0 if the given SBI
extension ID (EID) is not available, or 1 if it is available unless
defined as any other non-zero value by the implementation."
Additionally, sbiret.value is a long. Fix the implementation to
ensure any nonzero long value is considered a success, rather
than only positive int values.
Fixes: b9dcd9e41587 ("RISC-V: Add basic support for SBI v0.2")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230427163626.101042-1-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/riscv_pmu_sbi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index 3852c18362f5..382fe5ee6100 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -869,7 +869,7 @@ static int __init pmu_sbi_devinit(void) struct platform_device *pdev; if (sbi_spec_version < sbi_mk_version(0, 3) || - sbi_probe_extension(SBI_EXT_PMU) <= 0) { + !sbi_probe_extension(SBI_EXT_PMU)) { return 0; } |