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[2003:e4:1f3f:4900:f22f:74ff:fe1f:3a53]) by smtp.gmail.com with ESMTPSA id qq16-20020a17090720d000b0099bd046170fsm12242327ejb.104.2023.10.13.05.36.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Oct 2023 05:36:45 -0700 (PDT) Date: Fri, 13 Oct 2023 14:36:44 +0200 From: Thierry Reding To: jonathanh@nvidia.com, krzysztof.kozlowski@linaro.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Sumit Gupta Cc: bbasu@nvidia.com Subject: Re: (subset) [Patch v2 0/2] Fix hang due to CPU BW request as BPMP suspended Message-ID: References: <20231009100557.18224-1-sumitg@nvidia.com> <169719989291.3880029.32092032379655248.b4-ty@nvidia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="xPadoHu6msBICJZc" Content-Disposition: inline In-Reply-To: <169719989291.3880029.32092032379655248.b4-ty@nvidia.com> User-Agent: Mutt/2.2.12 (2023-09-09) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --xPadoHu6msBICJZc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Oct 13, 2023 at 02:25:12PM +0200, Thierry Reding wrote: > From: Thierry Reding >=20 >=20 > On Mon, 09 Oct 2023 15:35:55 +0530, Sumit Gupta wrote: > > This patch set fixes hang during system resume which started coming > > after adding Memory Interconnect and OPP support to the Tegra194 CPUFREQ > > in below change: > > f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth"). > >=20 > > Tegra194 CPUFREQ driver uses 'CPUFREQ_NEED_INITIAL_FREQ_CHECK' flag > > which causes a CPU frequency set request from the 'cpuhp_cpufreq_online' > > hotplug notifier during resume. The CPU frequency set call also triggers > > a DRAM bandwidth set request but the BPMP driver hasn't resumed yet > > which results in hang during resume. > >=20 > > [...] >=20 > Applied, thanks! >=20 > [2/2] memory: tegra: set BPMP msg flags to reset IPC channels > (no commit info) For the record, I've actually applied both patches, but applying them to different branches (i.e. resulting in two subsets for the same series) seems to have confused b4. 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