[PATCH 4.6 008/100] perf/x86/intel/uncore: Remove WARN_ON_ONCE in uncore_pci_probe

From: Greg Kroah-Hartman
Date: Mon May 30 2016 - 17:27:41 EST

4.6-stable review patch. If anyone has any objections, please let me know.


From: Jiri Olsa <jolsa@xxxxxxxxxx>

commit ef3f00a4d38e01ec0e7ad1b1c8edc2f5667aaa32 upstream.

When booting with nr_cpus=1, uncore_pci_probe tries to init the PCI/uncore
also for the other packages and fails with warning when they are not found.

The warning is bogus because it's correct to fail here for packages which are
not initialized. Remove it and return silently.

Fixes: cf6d445f6897 "perf/x86/uncore: Track packages, not per CPU data"
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

arch/x86/events/intel/uncore.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -888,7 +888,7 @@ static int uncore_pci_probe(struct pci_d
return -ENODEV;

pkg = topology_phys_to_logical_pkg(phys_id);
- if (WARN_ON_ONCE(pkg < 0))
+ if (pkg < 0)
return -EINVAL;

if (UNCORE_PCI_DEV_TYPE(id->driver_data) == UNCORE_EXTRA_PCI_DEV) {