linux-kernel - [PATCH v5 05/13] spi: airoha: switch back to non-dma mode in the case of error

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Message-ID: <20250823160116.3762730-6-mikhail.kshevetskiy@iopsys.eu>
Date: Sat, 23 Aug 2025 19:01:08 +0300
From: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
To: Lorenzo Bianconi <lorenzo@...nel.org>,
	Ray Liu <ray.liu@...oha.com>,
	Mark Brown <broonie@...nel.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Andy Shevchenko <andy@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jyothi Kumar Seerapu <quic_jseerapu@...cinc.com>
Cc: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
Subject: [PATCH v5 05/13] spi: airoha: switch back to non-dma mode in the case of error

Current dirmap code does not switch back to non-dma mode in the case of
error. This is wrong.

This patch fixes dirmap read/write error path.

Fixes: a403997c12019 ("spi: airoha: add SPI-NAND Flash controller driver")
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
Acked-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
 drivers/spi/spi-airoha-snfi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-airoha-snfi.c b/drivers/spi/spi-airoha-snfi.c
index 2d86dc62dbde..a39c3ab4af5c 100644
--- a/drivers/spi/spi-airoha-snfi.c
+++ b/drivers/spi/spi-airoha-snfi.c
@@ -691,13 +691,13 @@ static ssize_t airoha_snand_dirmap_read(struct spi_mem_dirmap_desc *desc,
 
 	err = airoha_snand_nfi_config(as_ctrl);
 	if (err)
-		return err;
+		goto error_dma_mode_off;
 
 	dma_addr = dma_map_single(as_ctrl->dev, txrx_buf, SPI_NAND_CACHE_SIZE,
 				  DMA_FROM_DEVICE);
 	err = dma_mapping_error(as_ctrl->dev, dma_addr);
 	if (err)
-		return err;
+		goto error_dma_mode_off;
 
 	/* set dma addr */
 	err = regmap_write(as_ctrl->regmap_nfi, REG_SPI_NFI_STRADDR,
@@ -797,6 +797,8 @@ static ssize_t airoha_snand_dirmap_read(struct spi_mem_dirmap_desc *desc,
 error_dma_unmap:
 	dma_unmap_single(as_ctrl->dev, dma_addr, SPI_NAND_CACHE_SIZE,
 			 DMA_FROM_DEVICE);
+error_dma_mode_off:
+	airoha_snand_set_mode(as_ctrl, SPI_MODE_MANUAL);
 	return err;
 }
 
@@ -926,6 +928,7 @@ static ssize_t airoha_snand_dirmap_write(struct spi_mem_dirmap_desc *desc,
 error_dma_unmap:
 	dma_unmap_single(as_ctrl->dev, dma_addr, SPI_NAND_CACHE_SIZE,
 			 DMA_TO_DEVICE);
+	airoha_snand_set_mode(as_ctrl, SPI_MODE_MANUAL);
 	return err;
 }
 
-- 
2.50.1