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perf/x86/intel/uncore: Fix reference count leak in hswep_has_limit_sbox()

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[ Upstream commit 1ff9dd6e70 ]

pci_get_device() will increase the reference count for the returned
'dev'. We need to call pci_dev_put() to decrease the reference count.
Since 'dev' is only used in pci_read_config_dword(), let's add
pci_dev_put() right after it.

Fixes: 9d480158ee ("perf/x86/intel/uncore: Remove uncore extra PCI dev HSWEP_PCI_PCU_3")
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/20221118063137.121512-3-wangxiongfeng2@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiongfeng Wang 2022-11-18 14:31:35 +08:00 committed by Greg Kroah-Hartman
parent 81b024df47
commit e293263248
1 changed files with 1 additions and 0 deletions
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arch/x86/events/intel/uncore_snbep.c
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@ -2762,6 +2762,7 @@ static bool hswep_has_limit_sbox(unsigned int device)
return false;
pci_read_config_dword(dev, HSWEP_PCU_CAPID4_OFFET, &capid4);
pci_dev_put(dev);
if (!hswep_get_chop(capid4))
return true;