Re: BUG: xhci_hcd Spurious interrupt

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Hi Dong,

Lawrence found an issue with your MSI/MSI-X patch.  Can you please look
it over?

Sarah Sharp

On Fri, Oct 22, 2010 at 10:40:30PM +0200, Lawrence Rust wrote:
> Hi,
> 
> Just built a 2.6.36 kernel and on re-booting got this error:
> 
> Oct 22 10:13:05 gagarin kernel: [    5.157428] xhci_hcd 0000:01:00.0: Failed to enable MSI-X
> Oct 22 10:13:05 gagarin kernel: [    5.157448] xhci_hcd 0000:01:00.0: failed to allocate MSI entry
> 
> followed by a stream of these...
> 
> Oct 22 10:13:05 gagarin kernel: [    5.891099] xhci_hcd 0000:01:00.0: Spurious interrupt.
> Oct 22 10:13:05 gagarin kernel: [    9.038074] xhci_hcd 0000:01:00.0: Spurious interrupt.
> Oct 22 10:13:05 gagarin kernel: [    9.088027] xhci_hcd 0000:01:00.0: Spurious interrupt.
> Oct 22 10:13:05 gagarin kernel: [    9.137971] xhci_hcd 0000:01:00.0: Spurious interrupt.
> 
> repeated until re-boot.
> 
> The .config file used for this build was from a working 2.6.35.7 using
> defaults for all differences.  NB this config had MSI disabled:
> 
> CONFIG_ARCH_SUPPORTS_MSI=y
> # CONFIG_PCI_MSI is not set
> 
> After re-building the kernel with MSI enabled:
> 
> CONFIG_ARCH_SUPPORTS_MSI=y
> CONFIG_PCI_MSI=y
> 
> the error message and spurious interrupts went away.  The motherboard is
> a Gigabyte GA-H55M-USB3
> http://www.gigabyte.com/products/product-page.aspx?pid=3444#ov
> 
> lspci -s 01:00.0 -v
> 01:00.0 USB Controller: NEC Corporation Device 0194 (rev 03) (prog-if 30)
> 	Subsystem: Giga-byte Technology Device 5007
> 	Flags: bus master, fast devsel, latency 0, IRQ 16
> 	Memory at fbdfe000 (64-bit, non-prefetchable) [size=8K]
> 	Capabilities: [50] Power Management version 3
> 	Capabilities: [70] Message Signalled Interrupts: Mask- 64bit+ Queue=0/3 Enable-
> 	Capabilities: [90] MSI-X: Enable+ Mask- TabSize=8
> 	Capabilities: [a0] Express Endpoint, MSI 00
> 	Capabilities: [100] Advanced Error Reporting <?>
> 	Capabilities: [140] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff
> 	Capabilities: [150] #18
> 	Kernel driver in use: xhci_hcd
> 	Kernel modules: xhci-hcd
> 
> Running "sh scripts/ver_linux" on the MSI enabled kernel reports:
> Linux gagarin 2.6.36-ga #2 SMP Fri Oct 22 11:03:10 CEST 2010 i686 GNU/Linux
>  
> Gnu C                  4.4.3
> Gnu make               3.81
> binutils               2.20.1
> util-linux             2.17.2
> mount                  support
> module-init-tools      3.11.1
> e2fsprogs              1.41.11
> pcmciautils            014
> Linux C Library        2.11.1
> Dynamic linker (ldd)   2.11.1
> Procps                 3.2.8
> Net-tools              1.60
> Kbd                    1.15
> Sh-utils               7.4
> wireless-tools         30
> Modules Loaded         xhci_hcd usblp binfmt_misc vboxnetadp vboxnetflt vboxdrv nfsd lockd sunrpc exportfs microcode ext2 dm_crypt snd_hda_codec_intelhdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec firmware_class snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi fbcon tileblit font bitblit softcursor snd_rawmidi i915 drm_kms_helper drm i2c_algo_bit video backlight output snd_seq_midi_event snd_seq snd_timer snd_seq_device snd joydev coretemp soundcore intel_agp it87 hwmon_vid lp parport usbhid hid r8169 mii agpgart snd_page_alloc
> 
> -- Lawrence Rust
> 
> 
> 
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