drm/nouveau/clk: Fix potential NULL pointer access when there is no fb subdev (cc90badd) · Commits · 戴 / test

drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -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);