On Mon, Oct 24, 2016 at 11:13 AM, Xuan Truong Nguyen
<nx-truong@xxxxxxxxxxx> wrote:
>> This is with shmobile_defconfig?
>
> yes. we also attach the configs file we used
> (lager-scif-pio-v4.9-rc2.config)
>
>> Does it work better if you enable CONFIG_SERIAL_SH_SCI_DMA?
>
> yes, it's better a little bit. the kernel does not hangs up, but the warning
> message is output.
> please refer lager-scif-dma.log.
>
> we tested on v4.9-rc2. the issue is the same.
>
> if you need any information, please let us know.
> WARNING: CPU: 0 PID: 2249 at drivers/dma/sh/rcar-dmac.c:1257 rcar_dmac_tx_status+0x128/0x4
> No descriptor for cookie!
> [<c03419e8>] (rcar_dmac_tx_status) from [<c0371e04>] (rx_timer_fn+0x48/0x148)
> [<c0371dbc>] (rx_timer_fn) from [<c016dedc>] (call_timer_fn+0x2c/0xa0)
That looks like a race condition between timeout handling and actual completion
of the DMA?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
