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Message-ID: <166929136800.4906.10626350141240755490.tip-bot2@tip-bot2>
Date: Thu, 24 Nov 2022 12:02:48 -0000
From: "tip-bot2 for Xiongfeng Wang" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Xiongfeng Wang <wangxiongfeng2@...wei.com>,
"Peter Zijlstra (Intel)" <peterz@...radead.org>,
Kan Liang <kan.liang@...ux.intel.com>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/x86/intel/uncore: Fix reference count leak in
hswep_has_limit_sbox()
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 1ff9dd6e7071a561f803135c1d684b13c7a7d01d
Gitweb: https://git.kernel.org/tip/1ff9dd6e7071a561f803135c1d684b13c7a7d01d
Author: Xiongfeng Wang <wangxiongfeng2@...wei.com>
AuthorDate: Fri, 18 Nov 2022 14:31:35 +08:00
Committer: Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 24 Nov 2022 11:09:25 +01:00
perf/x86/intel/uncore: Fix reference count leak in hswep_has_limit_sbox()
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: 9d480158ee86 ("perf/x86/intel/uncore: Remove uncore extra PCI dev HSWEP_PCI_PCU_3")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@...wei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>
Link: https://lore.kernel.org/r/20221118063137.121512-3-wangxiongfeng2@huawei.com
---
arch/x86/events/intel/uncore_snbep.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index b14d591..93b0f1f 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c
@@ -2910,6 +2910,7 @@ 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;
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