On Tue, May 30, 2023 at 11:55:03AM +0000, Wyes Karny wrote:
From: "Gautham R. Shenoy" gautham.shenoy@amd.com
[ Upstream commit 4badf2eb1e986bdbf34dd2f5d4c979553a86fe54 ]
Schedutil normally calls the adjust_perf callback for drivers with adjust_perf callback available and fast_switch_possible flag set. However, when frequency invariance is disabled and schedutil tries to invoke fast_switch. So, there is a chance of kernel crash if this function pointer is not set. To protect against this scenario add fast_switch callback to amd_pstate driver.
Fixes: 1d215f0319c2 ("cpufreq: amd-pstate: Add fast switch function for AMD P-State") Signed-off-by: Gautham R. Shenoy gautham.shenoy@amd.com Signed-off-by: Wyes Karny wyes.karny@amd.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com (cherry picked from commit 4badf2eb1e986bdbf34dd2f5d4c979553a86fe54)
drivers/cpufreq/amd-pstate.c | 37 +++++++++++++++++++++++++++++------- 1 file changed, 30 insertions(+), 7 deletions(-)
All now queued up, thanks.
greg k-h