hc
2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf
kernel/drivers/gpu/drm/radeon/rv740_dpm.c
....@@ -250,8 +250,12 @@
250250 ASIC_INTERNAL_MEMORY_SS, vco_freq)) {
251251 u32 reference_clock = rdev->clock.mpll.reference_freq;
252252 u32 decoded_ref = rv740_get_decoded_reference_divider(dividers.ref_div);
253
- u32 clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
254
- u32 clk_v = 0x40000 * ss.percentage *
253
+ u32 clk_s, clk_v;
254
+
255
+ if (!decoded_ref)
256
+ return -EINVAL;
257
+ clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
258
+ clk_v = 0x40000 * ss.percentage *
255259 (dividers.whole_fb_div + (dividers.frac_fb_div / 8)) / (clk_s * 10000);
256260
257261 mpll_ss1 &= ~CLKV_MASK;