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

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[ Upstream commit 17b8d847b9 ]

pci_get_device() will increase the reference count for the returned
pci_dev, so tgl_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 before exiting from __uncore_imc_init_box(). Add
pci_dev_put() for both normal and error path.

Fixes: fdb6482244 ("perf/x86: Add Intel Tiger Lake uncore support")
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/20221118063137.121512-5-wangxiongfeng2@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Xiongfeng Wang 2022-11-18 14:31:37 +08:00 • committed by Greg Kroah-Hartman

parent dc7f07bc1e

commit 254d2d3227

1 changed files with 3 additions and 0 deletions

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arch/x86/events/intel/uncore_snb.c

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