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| author | Ethan Zhao <haifeng.zhao@linux.intel.com> | 2024-03-05 15:21:14 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-27 01:19:36 +0300 |
| commit | e33ee8d5e6fcb54d0e04269e4303d30d54922303 (patch) | |
| tree | 48a440541395559ca08d31d37e3df406ad422930 /drivers/iommu | |
| parent | df62e22c2e27420e8990a4f09e30d7bf56c2036f (diff) | |
| download | linux-e33ee8d5e6fcb54d0e04269e4303d30d54922303.tar.xz | |
PCI: Make pci_dev_is_disconnected() helper public for other drivers
[ Upstream commit 39714fd73c6b60a8d27bcc5b431afb0828bf4434 ]
Make pci_dev_is_disconnected() public so that it can be called from
Intel VT-d driver to quickly fix/workaround the surprise removal
unplug hang issue for those ATS capable devices on PCIe switch downstream
hotplug capable ports.
Beside pci_device_is_present() function, this one has no config space
space access, so is light enough to optimize the normal pure surprise
removal and safe removal flow.
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Tested-by: Haorong Ye <yehaorong@bytedance.com>
Signed-off-by: Ethan Zhao <haifeng.zhao@linux.intel.com>
Link: https://lore.kernel.org/r/20240301080727.3529832-2-haifeng.zhao@linux.intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Stable-dep-of: 4fc82cd907ac ("iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/iommu')
0 files changed, 0 insertions, 0 deletions