kernel/linux.git/drivers/pci/access.c, branch linux-5.9.y

Merge branch 'pci/misc'

2020-08-05T23:24:16+00:00

- Convert PCIe capability PCIBIOS errors to errno (Bolarinwa Olayemi Saheed) - Align PCIe capability and PCI accessor return values (Bolarinwa Olayemi Saheed) - Replace http:// links with https:// (Alexander A. Klimov) - Replace lkml.org, spinics, gmane with lore.kernel.org (Bjorn Helgaas) - Update panic message to mention kzalloc(), not kmalloc() (Liao Pingfang) - Move PCI_VENDOR_ID_REDHAT definition to pci_ids.h (Huacai Chen) - Remove unused pci_lost_interrupt() (Heiner Kallweit) * pci/misc: PCI: Remove unused pci_lost_interrupt() PCI: Move PCI_VENDOR_ID_REDHAT definition to pci_ids.h PCI: Fix error in panic message PCI: Replace lkml.org, spinics, gmane with lore.kernel.org PCI: Replace http:// links with https:// PCI: Align PCIe capability and PCI accessor return values PCI: Convert PCIe capability PCIBIOS errors to errno

PCI: Fix pci_cfg_wait queue locking problem

2020-07-07T20:09:01+00:00

The pci_cfg_wait queue is used to prevent user-space config accesses to devices while they are recovering from reset. Previously we used these operations on pci_cfg_wait: __add_wait_queue(&pci_cfg_wait, ...) __remove_wait_queue(&pci_cfg_wait, ...) wake_up_all(&pci_cfg_wait) The wake_up acquires the wait queue lock, but the add and remove do not. Originally these were all protected by the pci_lock, but cdcb33f98244 ("PCI: Avoid possible deadlock on pci_lock and p->pi_lock"), moved wake_up_all() outside pci_lock, so it could race with add/remove operations, which caused occasional kernel panics, e.g., during vfio-pci hotplug/unplug testing: Unable to handle kernel read from unreadable memory at virtual address ffff802dac469000 Resolve this by using wait_event() instead of __add_wait_queue() and __remove_wait_queue(). The wait queue lock is held by both wait_event() and wake_up_all(), so it provides mutual exclusion. Fixes: cdcb33f98244 ("PCI: Avoid possible deadlock on pci_lock and p->pi_lock") Link: https://lore.kernel.org/linux-pci/79827f2f-9b43-4411-1376-b9063b67aee3@huawei.com/T/#u Based-on: https://lore.kernel.org/linux-pci/20191210031527.40136-1-zhengxiang9@huawei.com/ Based-on-patch-by: Xiang Zheng Signed-off-by: Bjorn Helgaas Tested-by: Xiang Zheng Cc: Heyi Guo Cc: Biaoxiang Ye

PCI: Align PCIe capability and PCI accessor return values

2020-06-26T18:50:41+00:00

The PCI config accessors (pci_read_config_word(), et al) return PCIBIOS_SUCCESSFUL (zero) or positive error values like PCIBIOS_FUNC_NOT_SUPPORTED. The PCIe capability accessors similarly return PCIBIOS errors, but in addition, they can return -EINVAL. This makes it harder than it should be to check for errors. Return PCIBIOS_BAD_REGISTER_NUMBER instead of -EINVAL in all PCIe capability accessors. Suggested-by: Bjorn Helgaas Link: https://lore.kernel.org/r/20200615073225.24061-9-refactormyself@gmail.com Signed-off-by: Bolarinwa Olayemi Saheed Signed-off-by: Bjorn Helgaas

PCI/AER: Save AER Capability for suspend/resume

2019-10-18T22:05:42+00:00

Previously we did not save and restore the AER configuration on suspend/resume, so the configuration may be lost after resume. Save the AER configuration during suspend and restore it during resume. [bhelgaas: commit log] Link: https://lore.kernel.org/r/92EBB4272BF81E4089A7126EC1E7B28492C3B007@IRSMSX101.ger.corp.intel.com Signed-off-by: Mayurkumar Patel Signed-off-by: Kuppuswamy Sathyanarayanan Signed-off-by: Bjorn Helgaas Reviewed-by: Andy Shevchenko

PCI: Make pcie_downstream_port() available outside of access.c

2019-09-07T12:45:25+00:00

pcie_downstream_port() is useful in other places where code needs to determine whether the PCIe port is downstream so make it available outside of access.c. Link: https://lore.kernel.org/r/20190822085553.62697-1-mika.westerberg@linux.intel.com Signed-off-by: Mika Westerberg Signed-off-by: Bjorn Helgaas Reviewed-by: Andy Shevchenko

PCI: Uninline PCI bus accessors for better ftracing

2018-10-04T21:37:37+00:00

The PCI bus config accessors could be inlined into other accessor functions, which makes it so they can't be traced. Force them to never be inlined so that ftrace can hook into these functions. Signed-off-by: Keith Busch Signed-off-by: Bjorn Helgaas

Merge branch 'pci/vpd'

2018-04-04T18:28:40+00:00

- consolidate VPD code in vpd.c (Bjorn Helgaas) * pci/vpd: PCI/VPD: Move VPD structures to vpd.c PCI/VPD: Move VPD quirks to vpd.c PCI/VPD: Move VPD sysfs code to vpd.c PCI/VPD: Move VPD access code to vpd.c

PCI: Tidy comments

2018-03-19T19:20:43+00:00

Remove pointless comments that tell us the file name, remove blank line comments, follow multi-line comment conventions. No functional change intended. Signed-off-by: Bjorn Helgaas

PCI/VPD: Move VPD access code to vpd.c

2018-03-19T18:06:11+00:00

Move the VPD-related code from access.c to vpd.c. The goal is to encapsulate all the VPD code and structures in vpd.c. No functional change intended. Signed-off-by: Bjorn Helgaas

Merge branch 'pci/spdx' into next

2018-02-01T17:40:07+00:00

* pci/spdx: PCI: Add SPDX GPL-2.0+ to replace implicit GPL v2 or later statement PCI: Add SPDX GPL-2.0+ to replace GPL v2 or later boilerplate PCI: Add SPDX GPL-2.0 to replace COPYING boilerplate PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate PCI: Add SPDX GPL-2.0 when no license was specified