Re: [PATCH] staging: fsl-mc: bus: Drop warning

[Matthias Brugger]

On 15/04/16 00:57, Stuart Yoder wrote:
> > -----Original Message-----
> > From: Matthias Brugger [mailto:mbrugger@xxxxxxxx]
> > Sent: Thursday, April 14, 2016 4:24 PM
> > To: German.Rivera@xxxxxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx
> > Cc: Stuart Yoder <stuart.yoder@xxxxxxx>; Scott Wood <scott.wood@xxxxxxx>; agraf@xxxxxxx; linux-
> > kernel@xxxxxxxxxxxxxxx; devel@xxxxxxxxxxxxxxxxxxxx; mbrugger@xxxxxxxx
> > Subject: [PATCH] staging: fsl-mc: bus: Drop warning
> >
> > When updating the irq_chip and msi_domain_ops, the code checkes for
> > already present functions.
> > When more then one ITS controller are present in the system,
> > irq_chip and msi_domain_ops got already set and a warning is invoked.
>
> How can this situation happen?  And what do you mean by
> multiple ITS controllers? ...multiple instances of the GIC ITS
> on an SoC?

Yes, there are two arm,gic-v3-its defined in the FDT.

~ # ll /proc/device-tree/interrupt-controller@8010\,00000000/
total 0
-r--r--r-- 1 root root  4 Apr 15 12:31 #address-cells
-r--r--r-- 1 root root 11 Apr 15 12:31 compatible
drwxr-xr-x 2 root root  0 Apr 15 12:31 gic-its@8010,00020000
drwxr-xr-x 2 root root  0 Apr 15 12:31 gic-its@9010,00020000
-r--r--r-- 1 root root  4 Apr 15 12:31 #interrupt-cells
-r--r--r-- 1 root root  0 Apr 15 12:31 interrupt-controller
-r--r--r-- 1 root root 12 Apr 15 12:31 interrupts
-r--r--r-- 1 root root  4 Apr 15 12:31 linux,phandle
-r--r--r-- 1 root root 21 Apr 15 12:31 name
-r--r--r-- 1 root root  4 Apr 15 12:31 phandle
-r--r--r-- 1 root root  0 Apr 15 12:31 ranges
-r--r--r-- 1 root root  4 Apr 15 12:31 #redistributor-regions
-r--r--r-- 1 root root 48 Apr 15 12:31 reg
-r--r--r-- 1 root root  4 Apr 15 12:31 #size-cells

Regards,
Matthias