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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 13:31:57 +0100 |
| commit | dc7f07bc1ebb56a23fd1c4f664db5cbeb8900800 (patch) | |
| tree | 813091ff5c37210ad262dd566a25497b2451f41e | |
| parent | bd66877c0b3b42eed0ecee0bd2a2a505c1e54177 (diff) | |
| download | linux-stable-dc7f07bc1ebb56a23fd1c4f664db5cbeb8900800.tar.gz linux-stable-dc7f07bc1ebb56a23fd1c4f664db5cbeb8900800.tar.bz2 linux-stable-dc7f07bc1ebb56a23fd1c4f664db5cbeb8900800.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>
| -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); |