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authorKajol Jain <kjain@linux.ibm.com>2021-07-13 13:12:16 +0530
committerMoritz Fischer <mdf@kernel.org>2021-07-27 11:05:16 -0700
commitec6446d5304b3c3dd692a1e244df7e40bbb5af36 (patch)
tree4eac186f242a6245748eb61f7a1d1ab9c285e8e1 /drivers/fpga
parentff1176468d368232b684f75e82563369208bc371 (diff)
downloadlinux-ec6446d5304b3c3dd692a1e244df7e40bbb5af36.tar.bz2
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 <yilun.xu@intel.com> Acked-by: Wu Hao <hao.wu@intel.com> Signed-off-by: Kajol Jain <kjain@linux.ibm.com> Signed-off-by: Moritz Fischer <mdf@kernel.org>
Diffstat (limited to 'drivers/fpga')
-rw-r--r--drivers/fpga/dfl-fme-perf.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c
index 4299145ef347..587c82be12f7 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;
}