Konrad Rzeszutek Wilk f8ac697423 xen/pci: We don't do multiple MSI's. ... commit 884ac2978a upstream. There is no hypercall to setup multiple MSI per PCI device. As such with these two new commits: - 08261d87f7 PCI/MSI: Enable multiple MSIs with pci_enable_msi_block_auto() - 5ca72c4f7c AHCI: Support multiple MSIs we would call the PHYSDEVOP_map_pirq 'nvec' times with the same contents of the PCI device. Sander discovered that we would get the same PIRQ value 'nvec' times and return said values to the caller. That of course meant that the device was configured only with one MSI and AHCI would fail with: ahci 0000:00:11.0: version 3.0 xen: registering gsi 19 triggering 0 polarity 1 xen: --> pirq=19 -> irq=19 (gsi=19) (XEN) [2013-02-27 19:43:07] IOAPIC[0]: Set PCI routing entry (6-19 -> 0x99 -> IRQ 19 Mode:1 Active:1) ahci 0000:00:11.0: AHCI 0001.0200 32 slots 4 ports 6 Gbps 0xf impl SATA mode ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp pio slum part ahci: probe of 0000:00:11.0 failed with error -22 That is b/c in ahci_host_activate the second call to devm_request_threaded_irq would return -EINVAL as we passed in (on the second run) an IRQ that was never initialized. Reported-and-Tested-by: Sander Eikelenboom <linux@eikelenboom.it> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-03-14 11:29:41 -07:00
..
acpi.c	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci	2012-03-23 14:02:12 -07:00
amd_bus.c	x86/PCI: amd: factor out MMCONFIG discovery	2012-01-06 12:11:19 -08:00
broadcom_bus.c	x86/PCI: read Broadcom CNB20LE host bridge info before PCI scan	2012-01-06 12:11:12 -08:00
bus_numa.c	x86/PCI: convert to pci_create_root_bus() and pci_scan_root_bus()	2012-01-06 12:11:14 -08:00
bus_numa.h
ce4100.c
common.c	x86/PCI: convert to pci_create_root_bus() and pci_scan_root_bus()	2012-01-06 12:11:14 -08:00
direct.c
early.c
fixup.c	x86: Fix boot on Twinhead H12Y	2012-10-02 10:30:33 -07:00
i386.c	x86/PCI: add spinlock held check to 'pcibios_fwaddrmap_lookup()'	2012-03-02 12:03:58 -08:00
init.c
irq.c
legacy.c	x86/PCI: use pci_scan_bus() instead of pci_scan_bus_parented()	2012-01-06 12:11:13 -08:00
Makefile	x86/PCI: build amd_bus.o only when CONFIG_AMD_NB=y	2012-01-12 07:54:18 -08:00
mmconfig-shared.c
mmconfig_32.c
mmconfig_64.c
mrst.c	x86/mrst/pci: avoid SoC fixups on non-SoC platforms	2012-02-23 12:33:27 -08:00
numaq_32.c	x86/PCI: use pci_scan_bus() instead of pci_scan_bus_parented()	2012-01-06 12:11:13 -08:00
olpc.c
pcbios.c	typo fixes: aera -> area, exntension -> extension	2011-12-09 15:22:07 +01:00
visws.c
xen.c	xen/pci: We don't do multiple MSI's.	2013-03-14 11:29:41 -07:00