Date: Tue, 22 May 2018 00:43:00 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 228409] PCI-PCI bridge IRQ not shared Message-ID: <bug-228409-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228409 Bug ID: 228409 Summary: PCI-PCI bridge IRQ not shared Product: Base System Version: CURRENT Hardware: i386 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: freebsd@tim.thechases.com I replaced the non-functioning Broadcom wifi card in my Dell Mini10 netbook with an ath0 wireless card (https://www.amazon.com/gp/product/B00JESLUWQ/). The dmesg output showed that it was identified, but that it couldn't allocate an interrupt: # dmesg | grep ath0 ath0: <Atheros 9280> mem 0xd8000000-0xd800ffff irq 17 at device 0.0 on pci2 ath0: could not map interrupt device_attach: ath0 attach returned 6 Checking on it, IRQ17 was in use by my pcib1: # dmesg | grep "irq 17" pcib1: <ACPI PCI-PCI bridge> irq 17 at device 28.0 on pci0 ath0: <Atheros 9280> mem 0xd8000000-0xd800ffff irq 17 at device 0.0 on pci2 Oleksandr Tymoshenko suggested a one-line diff (https://people.freebsd.org/~gonzo/patches/pci_pci-shareable-irq.diff) to make the PCI-PCI be RF_SHAREABLE. Building with that diff resolved the issue and now both the re0 (which AFAIC is the only item on pci1 on that pcib1) and the ath0 are working fine. So it *looks* like this solves the issue, but Adrian Chad informed me that "warner says "pcie interrupts aren't shared."" and requested that I open a PR on the matter to get more eyeballs on it. So I'm opening this as requested. Full conversation leading up to this can be found at https://lists.freebsd.org/pipermail/freebsd-wireless/2018-May/thread.html#7968 including the initial dmesg output and the relevant new dmesg ath0 output after applying Oleksandr's patch. -- You are receiving this mail because: You are the assignee for the bug.
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