On 03/27/2012 10:42 AM, Jiri Slaby wrote:
On 03/27/2012 10:40 AM, Jiri Slaby wrote:
Hi,
I'm getting spurious interrupts leading to disabling the interrupt: 42: 1916853 2471662 PCI-MSI-edge i915@pci:0000:00:02.0
The message: irq 42: nobody cared (try booting with the "irqpoll" option) Pid: 20716, comm: virtuoso-t Not tainted 3.3.0-next-20120326_64+ #1673
It is not new, but now I can reproduce it more-or-less reliably after an hour or so. It usually happens when playing a game using wine.
Do you want me to dump some registers when IRQ_NONE is returned from the ISR? As this is MSI, nobody else can sit there.
The handler *constantly* returns IRQ_NONE.
With this patch: --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -28,6 +28,7 @@
#include <linux/sysrq.h> #include <linux/slab.h> +#include <linux/ratelimit.h> #include "drmP.h" #include "drm.h" #include "i915_drm.h" @@ -1416,6 +1417,14 @@ static irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) iir = new_iir; }
+ if (ret == IRQ_NONE && printk_ratelimit()) { + printk(KERN_DEBUG "%s:", __func__); + for_each_pipe(pipe) { + printk(KERN_CONT " %d=%.8x", pipe, + pipe_stats[pipe]); + } + } + return ret; }
And I get: [ 3572.968581] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3572.977472] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3576.224839] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3576.243558] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3576.384912] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3576.403462] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3577.464100] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3577.477383] i915_driver_irq_handler: 0=00000000 1=00000000 [ 3577.829016] i915_driver_irq_handler: 0=00020000 1=00000000 [ 3577.830093] i915_driver_irq_handler: 0=00020000 1=00000000 [ 3578.013015] i915_driver_irq_handler: 12 callbacks suppressed
I don't know what to dump more, because iir is obviously zero too. What other sources of interrupts are on the (G33) chip?
Also lspci: 00:02.0 VGA compatible controller [0300]: Intel Corporation 82G33/G31 Express Integrated Graphics Controller [8086:29c2] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Intel Corporation 82G33/G31 Express Integrated Graphics Controller [8086:29c2] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 42 Region 0: Memory at feb80000 (32-bit, non-prefetchable) [size=512K] Region 1: I/O ports at ec00 [size=8] Region 2: Memory at d0000000 (32-bit, prefetchable) [size=256M] Region 3: Memory at fea00000 (32-bit, non-prefetchable) [size=1M] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Address: fee0300c Data: 4179 Capabilities: [d0] Power Management version 2 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Kernel driver in use: i915 00: 86 80 c2 29 07 04 90 00 02 00 00 03 00 00 00 00 10: 00 00 b8 fe 01 ec 00 00 08 00 00 d0 00 00 a0 fe 20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 c2 29 30: 00 00 00 00 90 00 00 00 00 00 00 00 05 01 00 00 40: 09 00 0b 01 00 00 00 00 01 00 00 00 00 00 00 00 50: 00 00 30 02 c9 03 00 00 00 00 00 00 00 00 80 af 60: 00 00 02 02 00 00 00 00 00 00 00 00 00 00 00 00 70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 90: 05 d0 01 00 0c 30 e0 fe 79 41 00 00 00 00 00 00 a0: 11 11 00 00 00 00 06 03 00 00 00 00 00 00 00 00 b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 d0: 01 00 22 00 00 00 00 00 00 00 00 00 00 01 02 00 e0: 00 00 00 00 00 00 00 00 00 80 00 00 00 00 00 00 f0: 10 00 00 00 00 00 00 00 90 0f 03 00 e4 e0 5b af
thanks,
-- js suse labs