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?
[ 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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