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[104.57.184.186]) by smtp.gmail.com with ESMTPSA id e65-20020aca3744000000b0033a169f9282sm3004515oia.52.2022.07.16.20.48.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 Jul 2022 20:48:08 -0700 (PDT) From: Bjorn Andersson To: Bjorn Andersson , Konrad Dybcio , Vinod Koul , Wolfram Sang Cc: linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] i2c: qcom-geni: Propagate GENI_ABORT_DONE to geni_i2c_abort_xfer() Date: Sat, 16 Jul 2022 20:50:26 -0700 Message-Id: <20220717035027.2135106-3-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220717035027.2135106-1-bjorn.andersson@linaro.org> References: <20220717035027.2135106-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Waiting for M_CMD_ABORT_EN in geni_i2c_abort_xfer() races with the interrupt handler which will read and clear the abort bit, the result is that every abort attempt takes 1 second and is followed by a message about the abort having times out. Introduce a new state variable to carry the abort_done state from the interrupt handler back to geni_i2c_abort_xfer(). Signed-off-by: Bjorn Andersson Reviewed-by: Vinod Koul --- drivers/i2c/busses/i2c-qcom-geni.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 3bec7c782824..e212e7ae7ad2 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -97,6 +97,7 @@ struct geni_i2c_dev { struct dma_chan *tx_c; struct dma_chan *rx_c; bool gpi_mode; + bool abort_done; }; struct geni_i2c_err_log { @@ -203,9 +204,14 @@ static void geni_i2c_err(struct geni_i2c_dev *gi2c, int err) dev_dbg(gi2c->se.dev, "len:%d, slv-addr:0x%x, RD/WR:%d\n", gi2c->cur->len, gi2c->cur->addr, gi2c->cur->flags); - if (err != NACK && err != GENI_ABORT_DONE) { + switch (err) { + case GENI_ABORT_DONE: + gi2c->abort_done = true; + break; + default: dev_err(gi2c->se.dev, "%s\n", gi2c_log[err].msg); geni_i2c_err_misc(gi2c); + break; } } @@ -311,21 +317,21 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev) static void geni_i2c_abort_xfer(struct geni_i2c_dev *gi2c) { - u32 val; unsigned long time_left = ABORT_TIMEOUT; unsigned long flags; spin_lock_irqsave(&gi2c->lock, flags); geni_i2c_err(gi2c, GENI_TIMEOUT); gi2c->cur = NULL; + gi2c->abort_done = false; geni_se_abort_m_cmd(&gi2c->se); spin_unlock_irqrestore(&gi2c->lock, flags); + do { time_left = wait_for_completion_timeout(&gi2c->done, time_left); - val = readl_relaxed(gi2c->se.base + SE_GENI_M_IRQ_STATUS); - } while (!(val & M_CMD_ABORT_EN) && time_left); + } while (!gi2c->abort_done && time_left); - if (!(val & M_CMD_ABORT_EN)) + if (!time_left) dev_err(gi2c->se.dev, "Timeout abort_m_cmd\n"); }