From: Vannoonnoo <mr.b34r@xxxxxxxxxxxx> divide error: 0000 [#1] SMP PTI CPU: 3 PID: 78925 Comm: tee Not tainted 5.15.50-1-lts #1 5c320a339f0e397222fdfc9449eff04c0b12ea83 Hardware name: MSI MS-7A59/Z270 SLI PLUS (MS-7A59), BIOS 1.90 01/30/2018 RIP: 0010:smu_v11_0_set_fan_speed_rpm+0x11/0x110 [amdgpu] Speed is user-configurable through a file. I accidentally set it to zero, and the driver crashed. --- drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c index 5f8809f6990d..69cebdb58c04 100644 --- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c +++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c @@ -1236,6 +1236,10 @@ int smu_v11_0_set_fan_speed_rpm(struct smu_context *smu, * - For some Sienna Cichlid SKU, the fan speed cannot be set * lower than 500 RPM. */ + + if (speed == 0) + return -EINVAL; + tach_period = 60 * crystal_clock_freq * 10000 / (8 * speed); WREG32_SOC15(THM, 0, mmCG_TACH_CTRL, REG_SET_FIELD(RREG32_SOC15(THM, 0, mmCG_TACH_CTRL), -- 2.36.1
