Re: Race condition between driver_probe_device and device_shutdown

[Ming Lei]

On Thu, Dec 6, 2012 at 5:11 PM, Wedson Almeida Filho <wedsonaf@xxxxxxxxx> wrote:
> [Sorry for taking so long to respond, after a week of silence I
> assumed I wouldn't get any responses, plus I had moved on to other
> things.]
>
> I happen to still have the logs, the relevant part is pasted at the end.
>
> Answering some of the questions: the driver is on the platform bus, in
> fact, it's drivers/usb/host/ehci-tegra.c; after seeing the oops below,
> I added printks when entering and exiting tegra_ehci_probe to try to
> understand it better.
>
> Note that in the log we see some thread entering tegra_ehci_probe, but
> nothing indicates that it has exited before we get the oops.

The commit d1c6c030fcec6f860d9bb6c632a3ebe62e28440b(driver core:
fix shutdown races with probe/remove(v3)) has been merged to v3.6, so
device_shutdown will wait for completing of probe.

Could you test kernel 3.6 or the latest kernel to see if the problem can be
reproduced?

Thanks,
--
Ming Lei
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