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Re: pca953x - warning on irq

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On Tue, 2011-12-27 at 10:33 +0100, Manfred Gruber wrote:
> Hi Yong Zhang!
> 
> Thx a lot, that fix removed the warning on 3.0.14-rt31+.

Hi,

I was thinking that this would have came into -rt as a 3.0 stable tree,
but it doesn't seem to.

Should this go into mainline stable?

And is it still needed for 3.0-rt?

Thanks!

-- Steve

> 
> Regards Manfred
> 
> Am Tuesday 27 December 2011 schrieb Yong Zhang:
> > On Mon, Dec 26, 2011 at 12:40 AM, Manfred Gruber <m.gruber@xxxxxxxxxxxxx> 
> wrote:
> > > Hello RT developers!
> > > 
> > > Great work on Preempt RT!
> > > 
> > > I get a warning at 3.0.9-rt25+ in a i2c pca953x chip when using IRQs at
> > > the gpio lines. It appears only once when the first irq happens, after
> > > that the warning is away. On 3.2.0-rc7 the warning does not happen.
> > > 
> > > I do not know how to remove/solve the warning, has someone an idea what I
> > > do wrong?
> > 
> > Could you please try upstream commit [6dd599f8: gpio/pca953x: Fix warning
> > of enabled interrupts in handler] ?
> > 
> > BTW, I think that commit should go to -stable.
> > 
> > Thanks,
> > Yong
> > 
> > > [   28.616000] sd 1:0:0:0: [sdb] Attached SCSI removable disk
> > > [   45.240000] ------------[ cut here ]------------
> > > [   45.240000] WARNING: at kernel/irq/handle.c:130
> > > handle_irq_event_percpu+0x68/0x168()
> > > [   45.240000] irq 130 handler irq_default_primary_handler+0x0/0x8
> > > enabled interrupts
> > > [   45.242000] Modules linked in:
> > > [   45.242000] [<c0039cd8>] (unwind_backtrace+0x0/0xec) from [<c00473d4>]
> > > (warn_slowpath_common+0x4c/)
> > > [   45.242000] [<c00473d4>] (warn_slowpath_common+0x4c/0x64) from
> > > [<c0047480>] (warn_slowpath_fmt+0x3)
> > > [   45.242000] [<c0047480>] (warn_slowpath_fmt+0x30/0x40) from
> > > [<c0078264>] (handle_irq_event_percpu+)
> > > [   45.242000] [<c0078264>] (handle_irq_event_percpu+0x68/0x168) from
> > > [<c00783b8>] (handle_irq_event+)
> > > [   45.242000] [<c00783b8>] (handle_irq_event+0x54/0x78) from
> > > [<c007a828>] (handle_simple_irq+0x84/0x)
> > > [   45.242000] [<c007a828>] (handle_simple_irq+0x84/0xac) from
> > > [<c0077eb0>] (generic_handle_irq+0x30/)
> > > [   45.242000] [<c0077eb0>] (generic_handle_irq+0x30/0x48) from
> > > [<c0168508>] (pca953x_irq_handler+0x9)
> > > [   45.242000] [<c0168508>] (pca953x_irq_handler+0x98/0xac) from
> > > [<c0078930>] (irq_thread_fn+0x1c/0x3)
> > > [   45.242000] [<c0078930>] (irq_thread_fn+0x1c/0x38) from [<c00787ec>]
> > > (irq_thread+0xc8/0x1f0)
> > > [   45.242000] [<c00787ec>] (irq_thread+0xc8/0x1f0) from [<c006082c>]
> > > (kthread+0x7c/0x84)
> > > [   45.242000] [<c006082c>] (kthread+0x7c/0x84) from [<c00358dc>]
> > > (kernel_thread_exit+0x0/0x8)
> > > [   45.242000] ---[ end trace 0000000000000002 ]---
> > > 
> > > # cat /proc/interrupts
> > >           CPU0
> > >  1:       8340       AIC  ttyS0
> > >  7:          2       AIC  ttyS2
> > >  9:        327       AIC  mmc0
> > >  12:      22381       AIC  atmel_spi.0
> > >  13:      74311       AIC  atmel_spi.1
> > >  19:     245940       AIC  tc_clkevt
> > >  20:        541       AIC  ohci_hcd:usb1
> > >  21:          2       AIC  eth0
> > > 103:          5      GPIO  0-0070
> > > 128:          0   pca953x  gpiolib
> > > 129:          0   pca953x  gpiolib
> > > 130:          2   pca953x  gpiolib
> > > 131:          0   pca953x  gpiolib
> > > 132:          0   pca953x  gpiolib
> > > 
> > > thx, regards manfred gruber
> > > 
> > > --
> > > 
> > > --
> > > To unsubscribe from this list: send the line "unsubscribe linux-rt-users"
> > > in the body of a message to majordomo@xxxxxxxxxxxxxxx
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> 
> 


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