user/sven/linux.git/drivers/cpufreq, branch v6.12.10

cpufreq: scmi: Fix cleanup path when boost enablement fails

2024-12-09T09:41:02Z

commit 8c776a54d9ef3e945db2fe407ad6ad4525422943 upstream. Include free_cpufreq_table in the cleanup path when boost enablement fails. cc: stable@vger.kernel.org Fixes: a8e949d41c72 ("cpufreq: scmi: Enable boost support") Signed-off-by: Sibi Sankar Signed-off-by: Viresh Kumar Signed-off-by: Greg Kroah-Hartman

cpufreq: mediatek-hw: Fix wrong return value in mtk_cpufreq_get_cpu_power()

2024-12-05T13:02:51Z

commit 172bf5ed04cb6c9e66d58de003938ed5c8756570 upstream. mtk_cpufreq_get_cpu_power() return 0 if the policy is NULL. Then in em_create_perf_table(), the later zero check for power is not invalid as power is uninitialized. As Lukasz suggested, it must return -EINVAL when the 'policy' is not found. So return -EINVAL to fix it. Cc: stable@vger.kernel.org Fixes: 4855e26bcf4d ("cpufreq: mediatek-hw: Add support for CPUFREQ HW") Reviewed-by: Lukasz Luba Suggested-by: Lukasz Luba Signed-off-by: Jinjie Ruan Signed-off-by: Viresh Kumar Signed-off-by: Greg Kroah-Hartman

cpufreq: CPPC: Fix wrong return value in cppc_get_cpu_power()

2024-12-05T13:02:12Z

[ Upstream commit b51eb0874d8170028434fbd259e80b78ed9b8eca ] cppc_get_cpu_power() return 0 if the policy is NULL. Then in em_create_perf_table(), the later zero check for power is not valid as power is uninitialized. As Quentin pointed out, kernel energy model core check the return value of active_power() first, so if the callback failed it should tell the core. So return -EINVAL to fix it. Fixes: a78e72075642 ("cpufreq: CPPC: Fix possible null-ptr-deref for cpufreq_cpu_get_raw()") Signed-off-by: Jinjie Ruan Suggested-by: Quentin Perret Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

cpufreq: CPPC: Fix wrong return value in cppc_get_cpu_cost()

2024-12-05T13:02:12Z

[ Upstream commit be392aa80f1e5b0b65ccc2a540b9304fefcfe3d8 ] cppc_get_cpu_cost() return 0 if the policy is NULL. Then in em_compute_costs(), the later zero check for cost is not valid as cost is uninitialized. As Quentin pointed out, kernel energy model core check the return value of get_cost() first, so if the callback failed it should tell the core. Return -EINVAL to fix it. Fixes: 1a1374bb8c59 ("cpufreq: CPPC: Fix possible null-ptr-deref for cppc_get_cpu_cost()") Reported-by: Dan Carpenter Closes: https://lore.kernel.org/all/c4765377-7830-44c2-84fa-706b6e304e10@stanley.mountain/ Signed-off-by: Jinjie Ruan Suggested-by: Quentin Perret Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

cpufreq: loongson3: Check for error code from devm_mutex_init() call

2024-12-05T13:02:12Z

[ Upstream commit db01e46689e9a986ca6b5d2f41b57d7a81551a4f ] Even if it's not critical, the avoidance of checking the error code from devm_mutex_init() call today diminishes the point of using devm variant of it. Tomorrow it may even leak something. Add the missed check. Fixes: ccf51454145b ("cpufreq: Add Loongson-3 CPUFreq driver support") Signed-off-by: Andy Shevchenko Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

cpufreq: CPPC: Fix possible null-ptr-deref for cppc_get_cpu_cost()

2024-12-05T13:02:06Z

[ Upstream commit 1a1374bb8c5926674973d849feed500bc61ad535 ] cpufreq_cpu_get_raw() may return NULL if the cpu is not in policy->cpus cpu mask and it will cause null pointer dereference, so check NULL for cppc_get_cpu_cost(). Fixes: 740fcdc2c20e ("cpufreq: CPPC: Register EM based on efficiency class information") Signed-off-by: Jinjie Ruan Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

cpufreq: CPPC: Fix possible null-ptr-deref for cpufreq_cpu_get_raw()

2024-12-05T13:02:06Z

[ Upstream commit a78e7207564258db6e373e86294a85f9d646d35a ] cpufreq_cpu_get_raw() may return NULL if the cpu is not in policy->cpus cpu mask and it will cause null pointer dereference. Fixes: 740fcdc2c20e ("cpufreq: CPPC: Register EM based on efficiency class information") Signed-off-by: Jinjie Ruan Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

cpufreq: loongson2: Unregister platform_driver on failure

2024-12-05T13:02:04Z

[ Upstream commit 5f856d71ccdf89b4bac0ff70ebb0bb582e7f7f18 ] When cpufreq_register_driver() returns error, the cpufreq_init() returns without unregister platform_driver, fix by add missing platform_driver_unregister() when cpufreq_register_driver() failed. Fixes: f8ede0f700f5 ("MIPS: Loongson 2F: Add CPU frequency scaling support") Signed-off-by: Yuan Can Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

cppc_cpufreq: Use desired perf if feedback ctrs are 0 or unchanged

2024-12-05T13:02:01Z

[ Upstream commit c47195631960b626058c335aec31f186fa854f97 ] The CPPC performance feedback counters could be 0 or unchanged when the target cpu is in a low-power idle state, e.g. power-gated or clock-gated. When the counters are 0, cppc_cpufreq_get_rate() returns 0 KHz, which makes cpufreq_online() get a false error and fail to generate a cpufreq policy. When the counters are unchanged, the existing cppc_perf_from_fbctrs() returns a cached desired perf, but some platforms may update the real frequency back to the desired perf reg. For the above cases in cppc_cpufreq_get_rate(), get the latest desired perf from the CPPC reg to reflect the frequency because some platforms may update the actual frequency back there; if failed, use the cached desired perf. Fixes: 6a4fec4f6d30 ("cpufreq: cppc: cppc_cpufreq_get_rate() returns zero in all error cases.") Signed-off-by: Jie Zhan Reviewed-by: Zeng Heng Reviewed-by: Ionela Voinescu Reviewed-by: Huisong Li Signed-off-by: Viresh Kumar Signed-off-by: Sasha Levin

amd-pstate: Set min_perf to nominal_perf for active mode performance gov

2024-12-05T13:01:18Z

[ Upstream commit 0c411b39e4f4ce8861301fa201cb4f817751311e ] The amd-pstate driver sets CPPC_REQ.min_perf to CPPC_REQ.max_perf when in active mode with performance governor. Typically CPPC_REQ.max_perf is set to CPPC.highest_perf. This causes frequency throttling on power-limited platforms which causes performance regressions on certain classes of workloads. Hence, set the CPPC_REQ.min_perf to the CPPC.nominal_perf or CPPC_REQ.max_perf, whichever is lower of the two. Fixes: ffa5096a7c33 ("cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors") Signed-off-by: Gautham R. Shenoy Reviewed-by: Mario Limonciello Link: https://lore.kernel.org/r/20241021101836.9047-2-gautham.shenoy@amd.com Signed-off-by: Mario Limonciello Signed-off-by: Sasha Levin