From c508eb042d9739bf9473526f53303721b70e9100 Mon Sep 17 00:00:00 2001 From: Xiongfeng Wang Date: Fri, 18 Nov 2022 14:31:34 +0800 Subject: perf/x86/intel/uncore: Fix reference count leak in sad_cfg_iio_topology() pci_get_device() will increase the reference count for the returned pci_dev, and also decrease the reference count for the input parameter *from* if it is not NULL. If we break the loop in sad_cfg_iio_topology() with 'dev' not NULL. We need to call pci_dev_put() to decrease the reference count. Since pci_dev_put() can handle the NULL input parameter, we can just add one pci_dev_put() right before 'return ret'. Fixes: c1777be3646b ("perf/x86/intel/uncore: Enable I/O stacks to IIO PMON mapping on SNR") Signed-off-by: Xiongfeng Wang Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Kan Liang Link: https://lore.kernel.org/r/20221118063137.121512-2-wangxiongfeng2@huawei.com --- arch/x86/events/intel/uncore_snbep.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/x86/events/intel') diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index b8f9bd150b42..b14d59183516 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -4743,6 +4743,8 @@ static int sad_cfg_iio_topology(struct intel_uncore_type *type, u8 *sad_pmon_map type->topology[die][stack_id].iio->pci_bus_no = dev->bus->number; } + pci_dev_put(dev); + return ret; } -- cgit v1.2.3