From mboxrd@z Thu Jan 1 00:00:00 1970 From: Varadarajan Narayanan Subject: [PATCH v4 04/14] spi: qup: Add completion timeout Date: Tue, 27 Jun 2017 15:15:21 +0530 Message-ID: <1498556731-13087-5-git-send-email-varada@codeaurora.org> References: <1498556731-13087-1-git-send-email-varada@codeaurora.org> Return-path: In-Reply-To: <1498556731-13087-1-git-send-email-varada-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, david.brown-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Varadarajan Narayanan List-Id: devicetree@vger.kernel.org Add i/o completion timeout for DMA and PIO modes. Signed-off-by: Andy Gross Signed-off-by: Varadarajan Narayanan --- drivers/spi/spi-qup.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index 59e799f..d3ccf53 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -330,7 +330,8 @@ static void spi_qup_dma_terminate(struct spi_master *master, dmaengine_terminate_all(master->dma_rx); } -static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer) +static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer, + unsigned long timeout) { struct spi_qup *qup = spi_master_get_devdata(master); int ret; @@ -353,10 +354,17 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer) dma_async_issue_pending(master->dma_tx); } + if (xfer->rx_buf && !wait_for_completion_timeout(&qup->rxc, timeout)) + return -ETIMEDOUT; + + if (xfer->tx_buf && !wait_for_completion_timeout(&qup->txc, timeout)) + return -ETIMEDOUT; + return 0; } -static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer) +static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer, + unsigned long timeout) { struct spi_qup *qup = spi_master_get_devdata(master); int ret; @@ -375,6 +383,9 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer) spi_qup_fifo_write(qup, xfer); + if (!wait_for_completion_timeout(&qup->done, timeout)) + return -ETIMEDOUT; + return 0; } @@ -618,7 +629,6 @@ static int spi_qup_transfer_one(struct spi_master *master, timeout = DIV_ROUND_UP(xfer->len * 8, timeout); timeout = 100 * msecs_to_jiffies(timeout); - spin_lock_irqsave(&controller->lock, flags); controller->xfer = xfer; controller->error = 0; @@ -629,10 +639,10 @@ static int spi_qup_transfer_one(struct spi_master *master, if (spi_qup_is_dma_xfer(controller->mode)) { reinit_completion(&controller->rxc); reinit_completion(&controller->txc); - ret = spi_qup_do_dma(master, xfer); + ret = spi_qup_do_dma(master, xfer, timeout); } else { reinit_completion(&controller->done); - ret = spi_qup_do_pio(master, xfer); + ret = spi_qup_do_pio(master, xfer, timeout); } if (ret) -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html