This is a note to let you know that I've just added the patch titled
PCI: Make pci_dev_is_disconnected() helper public for other drivers
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-make-pci_dev_is_disconnected-helper-public-for-o.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 18ae342873c7bc1ada5b89b072eafb1324baa873
Author: Ethan Zhao <haifeng.zhao@xxxxxxxxxxxxxxx>
Date: Tue Mar 5 20:21:14 2024 +0800
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@xxxxxxxxxx>
Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Tested-by: Haorong Ye <yehaorong@xxxxxxxxxxxxx>
Signed-off-by: Ethan Zhao <haifeng.zhao@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240301080727.3529832-2-haifeng.zhao@xxxxxxxxxxxxxxx
Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Stable-dep-of: 4fc82cd907ac ("iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 99abc4cec0df1..1b4f941829724 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -363,11 +363,6 @@ static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
return 0;
}
-static inline bool pci_dev_is_disconnected(const struct pci_dev *dev)
-{
- return dev->error_state == pci_channel_io_perm_failure;
-}
-
/* pci_dev priv_flags */
#define PCI_DEV_ADDED 0
#define PCI_DPC_RECOVERED 1
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 3af5f29985511..b548d5646a86d 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2477,6 +2477,11 @@ 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,
