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| author | Xiongfeng Wang <wangxiongfeng2@huawei.com> | 2022-11-18 14:31:36 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-31 13:25:44 +0100 |
| commit | a67146437b6428069b71a7e5e740a2a8e1c40ac9 (patch) | |
| tree | 907e9dd1a39242d05ca017e8823a25ff1f6336ef /arch | |
| parent | 48f32b9a74e2ac8e854bb87bfefdbc745125a123 (diff) | |
| download | linux-a67146437b6428069b71a7e5e740a2a8e1c40ac9.tar.gz linux-a67146437b6428069b71a7e5e740a2a8e1c40ac9.tar.bz2 linux-a67146437b6428069b71a7e5e740a2a8e1c40ac9.zip | |
perf/x86/intel/uncore: Fix reference count leak in snr_uncore_mmio_map()
[ Upstream commit 8ebd16c11c346751b3944d708e6c181ed4746c39 ]
pci_get_device() will increase the reference count for the returned
pci_dev, so snr_uncore_get_mc_dev() will return a pci_dev with its
reference count increased. We need to call pci_dev_put() to decrease the
reference count. Let's add the missing pci_dev_put().
Fixes: ee49532b38dd ("perf/x86/intel/uncore: Add IMC uncore support for Snow Ridge")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20221118063137.121512-4-wangxiongfeng2@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/events/intel/uncore_snbep.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index f5d89d06c66a..fcd95e93f479 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -4860,6 +4860,8 @@ static int snr_uncore_mmio_map(struct intel_uncore_box *box, addr += box_ctl; + pci_dev_put(pdev); + box->io_addr = ioremap(addr, type->mmio_map_size); if (!box->io_addr) { pr_warn("perf uncore: Failed to ioremap for %s.\n", type->name); |