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drm/nouveau/clk: Fix potential NULL pointer access when there is no fb subdev

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Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Karol Herbst 2016-07-12 21:36:08 +02:00 committed by Ben Skeggs
parent a8c119a4d0
commit cc90badd3c
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c
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@ -175,7 +175,7 @@ static int
nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
{
struct nvkm_subdev *subdev = &clk->subdev;
struct nvkm_ram *ram = subdev->device->fb->ram;
struct nvkm_fb *fb = subdev->device->fb;
struct nvkm_pci *pci = subdev->device->pci;
struct nvkm_pstate *pstate;
int ret, idx = 0;
@ -190,7 +190,8 @@ nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
nvkm_pcie_set_link(pci, pstate->pcie_speed, pstate->pcie_width);
if (ram && ram->func->calc) {
if (fb && fb->ram && fb->ram->func->calc) {
struct nvkm_ram *ram = fb->ram;
int khz = pstate->base.domain[nv_clk_src_mem];
do {
ret = ram->func->calc(ram, khz);