[DVB] ddbridge driver oops

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Dear Ralph,

I had a crash when testing the latest ddbridge driver.
I didn't manage to get all the call trace, but I manage to get some
information where the crash is coming from.
It seems to be related with a irq processing problem or scheduling/power
management.

Using gdb and the call trace address, it shows me an origin in line 2021
from this code "tasklet_schedule(&dev->dma[0].tasklet);" :

2016                    if (s & 0x00000004)
2017                            irq_handle_i2c(dev, 2);
2018                    if (s & 0x00000008)
2019                            irq_handle_i2c(dev, 3);
2020
2021                    if (s & 0x00000100)
2022                            tasklet_schedule(&dev->dma[0].tasklet);
2023                    if (s & 0x00000200)
2024                            tasklet_schedule(&dev->dma[1].tasklet);
2025                    if (s & 0x00000400)

Here is a part of the call trace I managed to get:

error_code
init_sched_groups_power
get_signal_to_deliver
wake_up_common
spin_lock_irqsave
wake_up
irq_handler+0x2a5/0x490 [ddbridge] => this translate to the code above

Sebastien

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