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

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[ Upstream commit 8ebd16c11c ]

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: ee49532b38 ("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>
This commit is contained in:
Xiongfeng Wang
2022-11-18 14:31:36 +08:00
committed by Greg Kroah-Hartman
parent c0539d5d47
commit d2afced511
1 changed files with 2 additions and 0 deletions
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arch/x86/events/intel/uncore_snbep.c
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@@ -4681,6 +4681,8 @@ static void __snr_uncore_mmio_init_box(struct intel_uncore_box *box,
addr += box_ctl; addr += box_ctl;
pci_dev_put(pdev);
box->io_addr = ioremap(addr, type->mmio_map_size); box->io_addr = ioremap(addr, type->mmio_map_size);
if (!box->io_addr) { if (!box->io_addr) {
pr_warn("perf uncore: Failed to ioremap for %s.\n", type->name); pr_warn("perf uncore: Failed to ioremap for %s.\n", type->name);