diff mbox series

[v2,3/9] spi: spi-s3c64xx: Report more information when errors occur

Message ID 20200821161401.11307-4-l.stelmach@samsung.com (mailing list archive)
State New, archived
Headers show
Series [v2,1/9] spi: spi-s3c64xx: swap s3c64xx_spi_set_cs() and s3c64xx_enable_datapath() | expand

Commit Message

Lukasz Stelmach Aug. 21, 2020, 4:13 p.m. UTC 
Report amount of pending data when a transfer stops due to errors.

Report if DMA was used to transfer data and print the status code.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

Comments

Krzysztof Kozlowski Aug. 22, 2020, 12:03 p.m. UTC | #1 
On Fri, Aug 21, 2020 at 06:13:55PM +0200, Łukasz Stelmach wrote:
> Report amount of pending data when a transfer stops due to errors.
> 
> Report if DMA was used to transfer data and print the status code.
> 
> Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>

I already reviewed v1. Include tags you receive on resubmissions.

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 22bf8c75580a..3364d362ed21 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -122,6 +122,7 @@ 
 
 struct s3c64xx_spi_dma_data {
 	struct dma_chan *ch;
+	dma_cookie_t cookie;
 	enum dma_transfer_direction direction;
 };
 
@@ -304,7 +305,7 @@  static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
 	desc->callback = s3c64xx_spi_dmacb;
 	desc->callback_param = dma;
 
-	dmaengine_submit(desc);
+	dma->cookie = dmaengine_submit(desc);
 	dma_async_issue_pending(dma->ch);
 }
 
@@ -699,17 +700,28 @@  static int s3c64xx_spi_transfer_one(struct spi_master *master,
 
 		if (status) {
 			dev_err(&spi->dev,
-				"I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
+				"I/O Error: rx-%d tx-%d rx-%c tx-%c len-%d dma-%d res-(%d)\n",
 				xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
 				(sdd->state & RXBUSY) ? 'f' : 'p',
 				(sdd->state & TXBUSY) ? 'f' : 'p',
-				xfer->len);
+				xfer->len, use_dma ? 1 : 0, status);
 
 			if (use_dma) {
-				if (xfer->tx_buf && (sdd->state & TXBUSY))
+				struct dma_tx_state s;
+
+				if (xfer->tx_buf && (sdd->state & TXBUSY)) {
+					dmaengine_pause(sdd->tx_dma.ch);
+					dmaengine_tx_status(sdd->tx_dma.ch, sdd->tx_dma.cookie, &s);
 					dmaengine_terminate_all(sdd->tx_dma.ch);
-				if (xfer->rx_buf && (sdd->state & RXBUSY))
+					dev_err(&spi->dev, "TX residue: %d\n", s.residue);
+
+				}
+				if (xfer->rx_buf && (sdd->state & RXBUSY)) {
+					dmaengine_pause(sdd->rx_dma.ch);
+					dmaengine_tx_status(sdd->rx_dma.ch, sdd->rx_dma.cookie, &s);
 					dmaengine_terminate_all(sdd->rx_dma.ch);
+					dev_err(&spi->dev, "RX residue: %d\n", s.residue);
+				}
 			}
 		} else {
 			s3c64xx_flush_fifo(sdd);