From: Viresh Kumar <viresh.kumar@linaro.org>
To: Dmitry Osipenko <digetx@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Georgi Djakov <georgi.djakov@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
Peter De Schrijver <pdeschrijver@nvidia.com>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Mikko Perttunen <cyndis@kapsi.fi>,
Viresh Kumar <vireshk@kernel.org>,
Peter Geis <pgwipeout@gmail.com>,
Nicolas Chauvet <kwizart@gmail.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH v6 46/52] opp: Put interconnect paths outside of opp_table_lock
Date: Wed, 28 Oct 2020 09:33:20 +0530 [thread overview]
Message-ID: <20201028040320.4nobxzudy3fuwmms@vireshk-i7> (raw)
In-Reply-To: <44169d24-4afc-5388-788f-d1e8263fc627@gmail.com>
On 27-10-20, 23:26, Dmitry Osipenko wrote:
> 27.10.2020 08:10, Viresh Kumar пишет:
> > On 26-10-20, 01:17, Dmitry Osipenko wrote:
> >> This patch fixes lockup which happens when OPP table is released if
> >> interconnect provider uses OPP in the icc_provider->set() callback
> >> and bandwidth of the ICC path is set to 0 by the ICC core when path
> >> is released. The icc_put() doesn't need the opp_table_lock protection,
> >> hence let's move it outside of the lock in order to resolve the problem.
> >>
> >> In particular this fixes tegra-devfreq driver lockup on trying to unload
> >> the driver module. The devfreq driver uses OPP-bandwidth API and its ICC
> >> provider also uses OPP for DVFS, hence they both take same opp_table_lock
> >> when OPP table of the devfreq is released.
> >>
> >> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> >> ---
> ...
> >
> > Never make such _fixes_ part of such a big patchset. Always send them
> > separately.
>
> Perhaps it's not obvious from the commit description that this patch
> doesn't fix any known problems of the current mainline kernel and it's
> needed only for the new patches.
No, I understood that we started getting the warning now only after
some other patches of yours. Nevertheless, it should be considered as
a fix only as that generated lockdep because of locking placement. And
so sending such stuff separately is better as that allows people to
apply it fast.
> > Having said that, I already have a patch with me which shall fix it for you as
> > well:
>
> I see that yours fix is already applied, thanks!
I hope it worked for you. Thanks.
--
viresh
next prev parent reply other threads:[~2020-10-28 23:50 UTC|newest]
Thread overview: 143+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-25 22:16 [PATCH v6 00/52] Introduce memory interconnect for NVIDIA Tegra SoCs Dmitry Osipenko
2020-10-25 22:16 ` [PATCH v6 01/52] clk: tegra: Export Tegra20 EMC kernel symbols Dmitry Osipenko
2020-10-27 13:04 ` Thierry Reding
2020-10-25 22:16 ` [PATCH v6 02/52] soc/tegra: fuse: Export tegra_read_ram_code() Dmitry Osipenko
2020-10-27 13:17 ` Thierry Reding
2020-10-25 22:16 ` [PATCH v6 03/52] dt-bindings: memory: tegra20: emc: Correct registers range in example Dmitry Osipenko
2020-10-27 13:18 ` Thierry Reding
2020-10-28 15:16 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 04/52] dt-bindings: memory: tegra20: emc: Document nvidia,memory-controller property Dmitry Osipenko
2020-10-27 8:54 ` Krzysztof Kozlowski
2020-10-27 19:17 ` Dmitry Osipenko
2020-10-27 19:30 ` Krzysztof Kozlowski
2020-10-27 20:37 ` Dmitry Osipenko
2020-10-28 15:23 ` Rob Herring
2020-10-28 15:35 ` Krzysztof Kozlowski
2020-10-28 15:23 ` [PATCH v6 04/52] dt-bindings: memory: tegra20: emc: Document nvidia, memory-controller property Rob Herring
2020-10-25 22:16 ` [PATCH v6 05/52] dt-bindings: memory: tegra20: mc: Document new interconnect property Dmitry Osipenko
2020-10-27 8:55 ` Krzysztof Kozlowski
2020-10-27 19:17 ` Dmitry Osipenko
2020-10-27 19:34 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 06/52] dt-bindings: memory: tegra20: emc: " Dmitry Osipenko
2020-10-27 9:03 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 07/52] dt-bindings: memory: tegra20: emc: Document OPP table and voltage regulator Dmitry Osipenko
2020-10-27 8:57 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 08/52] dt-bindings: memory: tegra20: emc: Document mfd-simple compatible and statistics sub-device Dmitry Osipenko
2020-10-27 9:02 ` Krzysztof Kozlowski
2020-10-27 19:22 ` Dmitry Osipenko
2020-10-27 19:44 ` Krzysztof Kozlowski
2020-10-27 20:18 ` Dmitry Osipenko
2020-10-28 15:26 ` Rob Herring
2020-10-31 19:53 ` Dmitry Osipenko
2020-10-27 13:22 ` Thierry Reding
2020-10-27 19:23 ` Dmitry Osipenko
2020-10-28 15:28 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 09/52] dt-bindings: memory: tegra30: mc: Document new interconnect property Dmitry Osipenko
2020-10-27 9:05 ` Krzysztof Kozlowski
2020-10-27 19:18 ` Dmitry Osipenko
2020-10-27 19:39 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 10/52] dt-bindings: memory: tegra30: emc: " Dmitry Osipenko
2020-10-25 22:16 ` [PATCH v6 11/52] dt-bindings: memory: tegra30: emc: Document OPP table and voltage regulator Dmitry Osipenko
2020-10-28 15:29 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 12/52] dt-bindings: memory: tegra124: mc: Document new interconnect property Dmitry Osipenko
2020-10-26 12:49 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 13/52] dt-bindings: memory: tegra124: emc: " Dmitry Osipenko
2020-10-26 12:51 ` Rob Herring
2020-10-27 10:25 ` Krzysztof Kozlowski
2020-10-27 19:19 ` Dmitry Osipenko
2020-10-27 19:48 ` Krzysztof Kozlowski
2020-10-27 20:16 ` Dmitry Osipenko
2020-10-28 19:27 ` Krzysztof Kozlowski
2020-10-25 22:16 ` [PATCH v6 14/52] dt-bindings: memory: tegra124: emc: Document OPP table and voltage regulator Dmitry Osipenko
2020-10-28 15:30 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 15/52] dt-bindings: tegra30-actmon: Document OPP and interconnect properties Dmitry Osipenko
2020-10-28 15:30 ` Rob Herring
2020-10-25 22:16 ` [PATCH v6 16/52] dt-bindings: host1x: Document new " Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 17/52] dt-bindings: memory: tegra20: Add memory client IDs Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 18/52] dt-bindings: memory: tegra30: " Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 19/52] dt-bindings: memory: tegra124: " Dmitry Osipenko
2020-10-28 15:31 ` Rob Herring
2020-10-25 22:17 ` [PATCH v6 20/52] ARM: tegra: Correct EMC registers size in Tegra20 device-tree Dmitry Osipenko
2020-10-27 9:10 ` Krzysztof Kozlowski
2020-10-27 20:43 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 21/52] ARM: tegra: Add interconnect properties to " Dmitry Osipenko
2020-10-27 9:12 ` Krzysztof Kozlowski
2020-10-27 13:30 ` Thierry Reding
2020-10-25 22:17 ` [PATCH v6 22/52] ARM: tegra: Add interconnect properties to Tegra30 device-tree Dmitry Osipenko
2020-10-27 9:15 ` Krzysztof Kozlowski
2020-10-27 19:23 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 23/52] ARM: tegra: Add interconnect properties to Tegra124 device-tree Dmitry Osipenko
2020-10-27 9:16 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 24/52] ARM: tegra: Add nvidia,memory-controller phandle to Tegra20 EMC device-tree Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 25/52] ARM: tegra: Add DVFS properties to Tegra20 EMC device-tree node Dmitry Osipenko
2020-10-27 9:18 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 26/52] ARM: tegra: Add DVFS properties to Tegra30 EMC and ACTMON device-tree nodes Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 27/52] ARM: tegra: Add DVFS properties to Tegra124 " Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 28/52] memory: tegra: Add and use devm_tegra_get_memory_controller() Dmitry Osipenko
2020-10-27 9:42 ` Krzysztof Kozlowski
2020-10-27 19:24 ` Dmitry Osipenko
2020-10-27 13:35 ` Thierry Reding
2020-10-25 22:17 ` [PATCH v6 29/52] memory: tegra-mc: Add interconnect framework Dmitry Osipenko
2020-10-27 13:48 ` Thierry Reding
2020-10-27 19:30 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 30/52] memory: tegra20-emc: Make driver modular Dmitry Osipenko
2020-10-27 13:49 ` Thierry Reding
2020-10-25 22:17 ` [PATCH v6 31/52] memory: tegra20-emc: Use devm_platform_ioremap_resource() Dmitry Osipenko
2020-10-27 13:50 ` Thierry Reding
2020-10-27 13:57 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 32/52] memory: tegra20-emc: Continue probing if timings are missing in device-tree Dmitry Osipenko
2020-10-27 13:52 ` Thierry Reding
2020-10-27 19:38 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 33/52] memory: tegra20: Support interconnect framework Dmitry Osipenko
2020-10-27 10:09 ` Krzysztof Kozlowski
2020-10-27 20:25 ` Dmitry Osipenko
2020-10-27 14:11 ` Thierry Reding
2020-10-27 20:22 ` Dmitry Osipenko
2020-10-27 21:12 ` Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 34/52] memory: tegra20-emc: Don't parse emc-stats node Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 35/52] memory: tegra: Add missing latency allowness entry for Page Table Cache Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 36/52] memory: tegra: Add FIFO sizes to Tegra30 memory clients Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 37/52] memory: tegra30-emc: Make driver modular Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 38/52] memory: tegra30-emc: Continue probing if timings are missing in device-tree Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 39/52] memory: tegra30: Support interconnect framework Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 40/52] memory: tegra124-emc: Make driver modular Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 41/52] memory: tegra124-emc: Use devm_platform_ioremap_resource() Dmitry Osipenko
2020-10-27 10:27 ` Krzysztof Kozlowski
2020-10-27 20:30 ` Dmitry Osipenko
2020-10-28 19:28 ` Krzysztof Kozlowski
2020-10-25 22:17 ` [PATCH v6 42/52] memory: tegra124: Support interconnect framework Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 43/52] memory: tegra: Remove superfluous error messages around platform_get_irq() Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 44/52] drm/tegra: dc: Support memory bandwidth management Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 45/52] drm/tegra: dc: Extend debug stats with total number of events Dmitry Osipenko
2020-10-25 22:17 ` [PATCH v6 46/52] opp: Put interconnect paths outside of opp_table_lock Dmitry Osipenko
2020-10-27 5:10 ` Viresh Kumar
2020-10-27 20:26 ` Dmitry Osipenko
2020-10-28 4:03 ` Viresh Kumar [this message]
2020-10-25 22:17 ` [PATCH v6 47/52] PM / devfreq: tegra20: Silence deferred probe error Dmitry Osipenko
2020-10-26 3:16 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 48/52] PM / devfreq: tegra20: Relax Kconfig dependency Dmitry Osipenko
2020-10-26 3:18 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 49/52] PM / devfreq: tegra20: Convert to EMC_STAT driver, support interconnect and device-tree Dmitry Osipenko
2020-11-01 13:31 ` Chanwoo Choi
2020-11-01 14:12 ` Dmitry Osipenko
2020-11-02 20:08 ` Dmitry Osipenko
2020-11-03 2:22 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 50/52] PM / devfreq: tegra30: Silence deferred probe error Dmitry Osipenko
2020-10-26 3:17 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 51/52] PM / devfreq: tegra30: Support interconnect and OPPs from device-tree Dmitry Osipenko
2020-11-01 14:39 ` Chanwoo Choi
2020-11-01 15:23 ` Dmitry Osipenko
2020-11-01 15:44 ` Chanwoo Choi
2020-11-01 15:49 ` Dmitry Osipenko
2020-11-01 15:57 ` Chanwoo Choi
2020-11-02 19:58 ` Dmitry Osipenko
2020-11-02 20:00 ` Dmitry Osipenko
2020-11-01 14:44 ` Chanwoo Choi
2020-11-01 15:24 ` Dmitry Osipenko
2020-11-01 15:45 ` Chanwoo Choi
2020-10-25 22:17 ` [PATCH v6 52/52] PM / devfreq: tegra30: Separate configurations per-SoC generation Dmitry Osipenko
2020-11-01 15:20 ` Chanwoo Choi
2020-10-26 15:08 ` [PATCH v6 00/52] Introduce memory interconnect for NVIDIA Tegra SoCs Krzysztof Kozlowski
2020-10-26 19:14 ` Dmitry Osipenko
2020-10-27 8:52 ` Krzysztof Kozlowski
2020-10-27 20:31 ` Dmitry Osipenko
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