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:

quoted

On Mon, Dec 26, 2011 at 12:40 AM, Manfred Gruber [off-list ref] 

wrote:

quoted

quoted

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

quoted

[   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

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