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path: root/drivers/pci/pcie/aer_inject.c
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2020-06-30PCI: Replace http:// links with https://Alexander A. Klimov
Replace http:// links with https:// links. This reduces the likelihood of man-in-the-middle attacks when developers open these links. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. [bhelgaas: also update samsung.com links, drop sourceforge link] Link: https://lore.kernel.org/r/20200627103050.71712-1-grandmaster@al2klimov.de Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2020-03-08PCI/AER: Fix the broken interrupt injectionThomas Gleixner
The AER error injection mechanism just blindly abuses generic_handle_irq() which is really not meant for consumption by random drivers. The include of linux/irq.h should have been a red flag in the first place. Driver code, unless implementing interrupt chips or low level hypervisor functionality has absolutely no business with that. Invoking generic_handle_irq() from non interrupt handling context can have nasty side effects at least on x86 due to the hardware trainwreck which makes interrupt affinity changes a fragile beast. Sathyanarayanan triggered a NULL pointer dereference in the low level APIC code that way. While the particular pointer could be checked this would only paper over the issue because there are other ways to trigger warnings or silently corrupt state. Invoke the new irq_inject_interrupt() mechanism, which has the necessary sanity checks in place and injects the interrupt via the irq_retrigger() mechanism, which is at least halfways safe vs. the fragile x86 affinity change mechanics. It's safe on x86 as it does not corrupt state, but it still can cause a premature completion of an interrupt affinity change causing the interrupt line to become stale. Very unlikely, but possible. For regular operations this is a non issue as AER error injection is meant for debugging and testing and not for usage on production systems. People using this should better know what they are doing. Fixes: 390e2db82480 ("PCI/AER: Abstract AER interrupt handling") Reported-by: sathyanarayanan.kuppuswamy@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Link: https://lkml.kernel.org/r/20200306130624.098374457@linutronix.de
2019-07-09PCI: Fix typos and whitespace errorsBjorn Helgaas
Fix typos in drivers/pci. Comment and whitespace changes only. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
2019-05-09PCI/AER: Log messages with pci_dev, not pcie_deviceFrederick Lawler
Log messages with pci_dev, not pcie_device. Factor out common message prefixes with dev_fmt(). Example output change: - aer 0000:00:00.0:pci002: AER enabled with IRQ ... + pcieport 0000:00:00.0: AER: enabled with IRQ ... Link: https://lore.kernel.org/lkml/20190509141456.223614-5-helgaas@kernel.org Signed-off-by: Frederick Lawler <fred@fredlawl.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
2018-10-18PCI/AER: Refactor error injection fallbacksKeith Busch
Move the bus ops fallback into separate functions. No functional change here. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-10-18PCI/AER: Abstract AER interrupt handlingKeith Busch
The aer_inject module was directly calling aer_irq(). This required the AER driver export its private IRQ handler for no other reason than to support error injection. A driver should not have to expose its private interfaces, so use the IRQ subsystem to route injection to the AER driver, and make aer_irq() a private interface. This provides additional benefits: First, directly calling the IRQ handler bypassed the IRQ subsytem so the injection wasn't really synthesizing what happens if a shared AER interrupt occurs. The error injection had to provide the callback data directly, which may be racing with a removal that is freeing that structure. The IRQ subsystem can handle that race. Finally, using the IRQ subsystem automatically reacts to threaded IRQs, keeping the error injection abstracted from that implementation detail. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-10-18PCI/AER: Reuse existing pcie_port_find_device() interfaceKeith Busch
The port services driver already provides a method to find the pcie_device for a service. Export that function, use it from the aer_inject module, and remove the duplicate functionality. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2018-06-11PCI/AER: Hoist aerdrv.c, aer_inject.c up to drivers/pci/pcie/Bjorn Helgaas
Hoist aerdrv.c, aer_inject.c up to drivers/pci/pcie/ so they're next to other PCIe service drivers. No functional change intended. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Keith Busch <keith.busch@intel.com>