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| author | Hou Tao <houtao1@huawei.com> | 2025-12-20 12:04:34 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2026-01-08 09:27:50 -0600 |
| commit | 6220694c52a5a04102b48109e4f24e958b559bd3 (patch) | |
| tree | d1a26cdffe40d5d2e9362e5263830143db3fac15 /tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git | |
| parent | 8f0b4cce4481fb22653697cced8d0d04027cb1e8 (diff) | |
PCI/P2PDMA: Release per-CPU pgmap ref when vm_insert_page() fails
When vm_insert_page() fails in p2pmem_alloc_mmap(), p2pmem_alloc_mmap()
doesn't invoke percpu_ref_put() to free the per-CPU ref of pgmap acquired
after gen_pool_alloc_owner(), and memunmap_pages() will hang forever when
trying to remove the PCI device.
Fix it by adding the missed percpu_ref_put().
Fixes: 7e9c7ef83d78 ("PCI/P2PDMA: Allow userspace VMA allocations through sysfs")
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Alistair Popple <apopple@nvidia.com>
Link: https://patch.msgid.link/20251220040446.274991-2-houtao@huaweicloud.com
Diffstat (limited to 'tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions