diff options
| author | Ethan Zhao <haifeng.zhao@linux.intel.com> | 2024-03-05 15:21:14 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-03-06 19:35:53 +0300 |
| commit | 39714fd73c6b60a8d27bcc5b431afb0828bf4434 (patch) | |
| tree | 41ae364edc1d2d3ba326ad6bec21322a18283b66 /include/linux/pci.h | |
| parent | def054b01a867822254e1dda13d587f5c7a99e2a (diff) | |
| download | linux-39714fd73c6b60a8d27bcc5b431afb0828bf4434.tar.xz | |
PCI: Make pci_dev_is_disconnected() helper public for other drivers
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>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 7ab0d13672da..213109d3c601 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2517,6 +2517,11 @@ static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) return NULL; } +static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) +{ + return dev->error_state == pci_channel_io_perm_failure; +} + void pci_request_acs(void); bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); bool pci_acs_path_enabled(struct pci_dev *start, |