From: Ezequiel Garcia <ezequiel@collabora.com>
To: Aaro Koskinen <aaro.koskinen@iki.fi>,
linux-mips@linux-mips.org, linux-mmc@vger.kernel.org,
linux-kernel@vger.kernel.org,
Ulf Hansson <ulf.hansson@linaro.org>,
Mathieu Malaterre <malat@debian.org>,
Ezequiel Garcia <ezequiel@collabora.co.uk>
Subject: Re: Bug report: MIPS CI20/jz4740-mmc DMA and PREEMPT_NONE
Date: Wed, 17 Oct 2018 14:55:18 -0300 [thread overview]
Message-ID: <75b42b9f86b504bbd84dfab1e2c6fd0965216c67.camel@collabora.com> (raw)
In-Reply-To: <20181014170431.GK3461@darkstar.musicnaut.iki.fi>
On Sun, 2018-10-14 at 20:04 +0300, Aaro Koskinen wrote:
> Hi,
>
> There is something wrong with jz4740-mmc in current mainline kernel
> (tested v4.18 and 4.19-rc, the MMC support for CI20 does not exist
> prior those), as the DMA support does not work properly if I disable
> kernel pre-emption. The console gets flooded with:
>
> [ 16.461094] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 567 host->next_data.cookie 568
> [ 16.473120] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 568 host->next_data.cookie 569
> [ 16.485144] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 569 host->next_data.cookie 570
> [ 16.497170] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 570 host->next_data.cookie 571
> [ 16.509194] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 571 host->next_data.cookie 572
> [ 16.532421] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 572 host->next_data.cookie 573
> [ 16.544594] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 573 host->next_data.cookie 574
> [ 16.556621] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 574 host->next_data.cookie 575
> [ 16.568638] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 575 host->next_data.cookie 576
> [ 16.601092] jz4740-mmc 13450000.mmc: [jz4740_mmc_prepare_dma_data] invalid cookie: data->host_cookie 582 host->next_data.cookie 583
>
> etc. ad inf.
>
> This should be easily reproducible on CI20 board with ci20_defconfig
> and setting CONFIG_PREEMPT_NONE=y.
>
Will take a look as soon as possible, most likely after ELCE.
Thanks,
Eze
prev parent reply other threads:[~2018-10-17 17:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-14 17:04 Bug report: MIPS CI20/jz4740-mmc DMA and PREEMPT_NONE Aaro Koskinen
2018-10-17 13:38 ` Mathieu Malaterre
2018-10-17 19:50 ` Aaro Koskinen
2018-11-12 21:04 ` Ezequiel Garcia
2018-10-17 17:55 ` Ezequiel Garcia [this message]
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