From bd8408e69a47f8e9f5d95c5d919413fafecc1e73 Mon Sep 17 00:00:00 2001 From: Tom Rix Date: Sat, 2 Jul 2022 11:39:04 -0400 Subject: [PATCH] drm/nouveau/bios: set info only when the return is not 0 clang static analysis reports drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c:68:17: warning: The right operand of '*' is a garbage value [core.UndefinedBinaryOperatorResult] switch (!!data * *ver) { ^ ~~~~ A switch statement with only a default should be reduced to an if. If nvbios_pmuEp() returns 0, via the data variable, the output info parameter is not used. So set info only when data is not 0. The struct nvbios_pmuE only has the type and data elements. Since both of these are explicitly set, memset is not needed. So remove it. Signed-off-by: Tom Rix Reviewed-by: Lyude Paul Signed-off-by: Lyude Paul Link: https://patchwork.freedesktop.org/patch/msgid/20220702153904.1696595-1-trix@redhat.com --- drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c index b4a308f3cf7b..49e2664a734c 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.c @@ -64,12 +64,9 @@ nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, struct nvbios_pmuE *info) { u32 data = nvbios_pmuEe(bios, idx, ver, hdr); - memset(info, 0x00, sizeof(*info)); - switch (!!data * *ver) { - default: + if (data) { info->type = nvbios_rd08(bios, data + 0x00); info->data = nvbios_rd32(bios, data + 0x02); - break; } return data; } -- 2.11.0