From: Stephen Boyd <swboyd@chromium.org>
To: Akash Asthana <akashast@codeaurora.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Douglas Anderson <dianders@chromium.org>,
Wolfram Sang <wsa@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org,
Douglas Anderson <dianders@chromium.org>,
Andy Gross <agross@kernel.org>,
Mukesh Savaliya <msavaliy@codeaurora.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] Revert "i2c: i2c-qcom-geni: Fix DMA transfer race"
Date: Fri, 09 Oct 2020 17:39:52 -0700 [thread overview]
Message-ID: <160229039221.310579.11648298092136196056@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <20201008155154.2.I7b22281453b8a18ab16ef2bfd4c641fb1cc6a92c@changeid>
Quoting Douglas Anderson (2020-10-08 15:52:34)
> This reverts commit 02b9aec59243c6240fc42884acc958602146ddf6.
>
> As talked about in the patch ("soc: qcom: geni: More properly switch
> to DMA mode"), swapping the order of geni_se_setup_m_cmd() and
> geni_se_xx_dma_prep() can sometimes cause corrupted transfers. Thus
> we traded one problem for another. Now that we've debugged the
> problem further and fixed the geni helper functions to more disable
> FIFO interrupts when we move to DMA mode we can revert it and end up
> with (hopefully) zero problems!
>
> To be explicit, the patch ("soc: qcom: geni: More properly switch
> to DMA mode") is a prerequisite for this one.
>
> Fixes: 02b9aec59243 ("i2c: i2c-qcom-geni: Fix DMA transfer race")
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> ---
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
next prev parent reply other threads:[~2020-10-10 1:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-08 22:52 [PATCH 0/3] i2c: i2c-qcom-geni: More properly fix the DMA race Douglas Anderson
2020-10-08 22:52 ` [PATCH 1/3] soc: qcom: geni: More properly switch to DMA mode Douglas Anderson
2020-10-10 0:39 ` Stephen Boyd
2020-10-12 9:05 ` Akash Asthana
2020-10-13 21:35 ` Doug Anderson
2020-10-12 8:09 ` Akash Asthana
2020-10-08 22:52 ` [PATCH 2/3] Revert "i2c: i2c-qcom-geni: Fix DMA transfer race" Douglas Anderson
2020-10-10 0:39 ` Stephen Boyd [this message]
2020-10-12 8:12 ` Akash Asthana
2020-10-08 22:52 ` [PATCH 3/3] soc: qcom: geni: Optimize select fifo/dma mode Douglas Anderson
2020-10-10 0:32 ` Stephen Boyd
2020-10-13 21:38 ` Doug Anderson
2020-10-10 0:26 ` [PATCH 0/3] i2c: i2c-qcom-geni: More properly fix the DMA race Stephen Boyd
2020-10-10 13:16 ` Dmitry Baryshkov
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