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[46.91.230.29]) by smtp.gmail.com with ESMTPSA id x5sm40173776wru.12.2019.04.15.04.32.13 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 15 Apr 2019 04:32:13 -0700 (PDT) Date: Mon, 15 Apr 2019 13:32:13 +0200 From: Thierry Reding To: Manikanta Maddireddy Cc: bhelgaas@google.com, robh+dt@kernel.org, mark.rutland@arm.com, jonathanh@nvidia.com, lorenzo.pieralisi@arm.com, vidyas@nvidia.com, linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH 08/30] PCI: tegra: Disable AFI dynamic clock gating Message-ID: <20190415113213.GI29254@ulmo> References: <20190411170355.6882-1-mmaddireddy@nvidia.com> <20190411170355.6882-9-mmaddireddy@nvidia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="4LwthZj+AV2mq5CX" Content-Disposition: inline In-Reply-To: <20190411170355.6882-9-mmaddireddy@nvidia.com> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org --4LwthZj+AV2mq5CX Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Apr 11, 2019 at 10:33:33PM +0530, Manikanta Maddireddy wrote: > Outstanding write counter in AFI is used to generate idle signal to > dynamically gate the AFI clock. When there are 32 outstanding writes > from AFI to memory, the outstanding write counter overflows and > indicates that there are "0" outstanding write transactions. >=20 > When memory controller is under heavy load, write completions to AFI > gets delayed and AFI write counter overflows. This causes AFI clock gating > even when there are outstanding transactions towards memory controller > resutling in system hang. s/resutling/resulting/ With that fixed: Acked-by: Thierry Reding --4LwthZj+AV2mq5CX Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAly0a7wACgkQ3SOs138+ s6H7Pw//YXsORx2wrc4XpQ66886+swzirPX74X+sHYCYJYt4Z2BfkvoZkYaPEfqv rIjIv83dIiBOCuXh2ORfX7xH3u0sLiIHLvLmmyCMAWy8nJQNUrJ4VIPl9PApkpbr mRjLiGlsFEVZn+zFEXOhSURWQitb/ucYU2m8MsFZZzZxQx1GJ+uzlXv3GBk27jOn uJr18ef07rI4snfup9iCPWrzMU9QQKIHz/92zN05zNCo555XOiSLrghCsFNO8eqo 3oBoChvVvizKMfjmrVJjpFwuKGWy6NpMU5aIAmr674hHZCmodGGPsJTQqIPqKt3r Vfi5xIFcPhmfl9VUYjD+M2rzPK+gI3xV+LnSgjbWzwj2SS7ANPhkzx5w4xu+oF/l k2MpUuDkuIlqXmgo8JcGLZ6RLTi4yVnlJb+T0dD3ZjAvnOG4o6DICLiyOI8PnZcZ E5WRkEhJs2hf5f919M3sCAomnIhneI+tqI8KpB0Rn5AU05FX3AwEhXFKbYvhZl+8 ectB/PrmCuChrNyTzC1+orJu+TOwoRPTbi/nzXmHbuQ6FFZlzo00A/0BPJvDhDqa CgzMqSGCY6C8WM3kgvnYA/EyaTBnWeafscGDxG353cT/2rYcHrbWO2YtMum1tAuP gWav1QW6XAU0b3BRZAZBRoz9UWXko1gSIrC6zArDsw1RVrMc6ME= =mA7t -----END PGP SIGNATURE----- --4LwthZj+AV2mq5CX--