Олег reported that a MIL-1553b card called TA1-PCI worked in v4.2 but not in v4.3. Apparently the driver does not receive interrupts in v4.3. The driver seems to be this out-of-tree code: https://github.com/qmor/elcus-1553-driver-linux
Created attachment 201211 [details] dmesg_log_4.3.0-1
Created attachment 201221 [details] dmesg_log_4.2.6-3
Created attachment 201231 [details] lspci_4.3.0-1
Created attachment 201241 [details] lspci_4.2.6-3
After bisect procedure i've got this: 991de2e59090e55c65a7f59a049142e3c480f7bd is the first bad commit commit 991de2e59090e55c65a7f59a049142e3c480f7bd Author: Jiang Liu <jiang.liu@linux.intel.com> Date: Wed Jun 10 16:54:59 2015 +0800 PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq() To support IOAPIC hotplug, we need to allocate PCI IRQ resources on demand and free them when not used anymore. Implement pcibios_alloc_irq() and pcibios_free_irq() to dynamically allocate and free PCI IRQs. Remove mp_should_keep_irq(), which is no longer used. [bhelgaas: changelog] Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> :040000 040000 765e2d5232d53247ec260b34b51589c3bccb36ae f680234a27685e94b1a35ae2a7218f8eafa9071a M arch :040000 040000 d55a682bcde72682e883365e88ad1df6186fd54d f82c470a04a6845fcf5e0aa934512c75628f798d M drivers
I confirmed it works in 890e4847587f and do not works in 991de2e59090
RocketRAID 272x driver doesn't work too since 4.3 due to the same problem. http://www.highpoint-tech.com/USA_new/series_rr272x_configuration.htm It works with 'pci=routeirq' parameter.
Is this fixed? I reverted 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()"), and the revert appeared in v4.5. Here's the revert: http://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?id=6c777e8799a9
I'm closing this on the assumption that the revert fixed it. Please reopen if that's not the case.