From mboxrd@z Thu Jan 1 00:00:00 1970 From: Douglas Anderson Subject: [PATCH v3 0/3] spi: A better solution for cros_ec_spi reliability Date: Tue, 14 May 2019 11:39:32 -0700 Message-ID: <20190514183935.143463-1-dianders@chromium.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: linux-rockchip@lists.infradead.org, drinkcat@chromium.org, Guenter Roeck , briannorris@chromium.org, mka@chromium.org, Douglas Anderson , linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org To: Mark Brown , Benson Leung , Enric Balletbo i Serra Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org This series is a much better solution for getting the Chrome OS EC to talk reliably. Patch #1 in this series is the most important. It can land any time. Patch #2 in this series (a SPI framework patch) needs to land before patch #3. Note that patches #2 and #3 really just fix a corner case and just having patch #1 is the most important. We don't end up on the pumping thread very often. Note: - If you want some history on investigation done here, feel free to peruse the Chrome OS bug: . Changes in v3: - cros_ec realtime patch replaces revert; now patch #1 - SPI core change now like patch v1 patch #2 (with name "rt"). - Updated description and variable name since we no longer force. Changes in v2: - Now only force transfers to the thread for devices that want it. - Squashed patch #1 and #2 together. - Renamed variable to "force_rt_transfers". - Renamed variable to "force_rt_transfers". Douglas Anderson (3): platform/chrome: cros_ec_spi: Move to real time priority for transfers spi: Allow SPI devices to request the pumping thread be realtime platform/chrome: cros_ec_spi: Request the SPI thread be realtime drivers/platform/chrome/cros_ec_spi.c | 89 +++++++++++++++++++++++---- drivers/spi/spi.c | 36 +++++++++-- include/linux/spi/spi.h | 2 + 3 files changed, 110 insertions(+), 17 deletions(-) -- 2.21.0.1020.gf2820cf01a-goog