From: Kajol Jain Date: Tue, 13 Jul 2021 07:42:16 +0000 (+0530) Subject: fpga: dfl: fme: Fix cpu hotplug issue in performance reporting X-Git-Tag: v5.15~591^2~1^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ec6446d5304b3c3dd692a1e244df7e40bbb5af36;p=platform%2Fkernel%2Flinux-starfive.git fpga: dfl: fme: Fix cpu hotplug issue in performance reporting The performance reporting driver added cpu hotplug feature but it didn't add pmu migration call in cpu offline function. This can create an issue incase the current designated cpu being used to collect fme pmu data got offline, as based on current code we are not migrating fme pmu to new target cpu. Because of that perf will still try to fetch data from that offline cpu and hence we will not get counter data. Patch fixed this issue by adding pmu_migrate_context call in fme_perf_offline_cpu function. Fixes: 724142f8c42a ("fpga: dfl: fme: add performance reporting support") Cc: stable@vger.kernel.org Tested-by: Xu Yilun Acked-by: Wu Hao Signed-off-by: Kajol Jain Signed-off-by: Moritz Fischer --- diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c index 4299145..587c82b 100644 --- a/drivers/fpga/dfl-fme-perf.c +++ b/drivers/fpga/dfl-fme-perf.c @@ -953,6 +953,8 @@ static int fme_perf_offline_cpu(unsigned int cpu, struct hlist_node *node) return 0; priv->cpu = target; + perf_pmu_migrate_context(&priv->pmu, cpu, target); + return 0; }