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Signed-off-by: Frank Li --- Check patch report exceed 100 chars, but it's still better put into one line to keep consistent with other DEFINE_FREE and better readablity change in v2 - remove surpoiouse remove empty line --- include/linux/dmaengine.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 99efe2b9b4ea9844ca6161208362ef18ef111d96..27fa1646a807c49c781e1bce9e3= e7d9a3c66f41d 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -5,6 +5,7 @@ #ifndef LINUX_DMAENGINE_H #define LINUX_DMAENGINE_H =20 +#include #include #include #include @@ -1612,6 +1613,8 @@ static inline int dmaengine_desc_free(struct dma_asyn= c_tx_descriptor *desc) return desc->desc_free(desc); } =20 +DEFINE_FREE(dma_async_tx_descriptor, struct dma_async_tx_descriptor *, if = (_T) dmaengine_desc_free(_T)) + /* --- DMA device --- */ =20 int dma_async_device_register(struct dma_device *device); --=20 2.34.1 From nobody Wed Dec 17 17:47:28 2025 Received: from DU2PR03CU002.outbound.protection.outlook.com (mail-northeuropeazon11011000.outbound.protection.outlook.com [52.101.65.0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B39F42C0F83; 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No functional change. Signed-off-by: Frank Li --- change v2 need goto unmap buffer. desc_prepare_err_exit: dma_unmap_single(txchan->device->dev, dma->dma_tx_addr, dma->rx_cmd_buf_len, DMA_TO_DEVICE); return -EINVAL; submit_err_exit: dma_unmap_single(txchan->device->dev, dma->dma_tx_addr, dma->rx_cmd_buf_len, DMA_TO_DEVICE); dmaengine_desc_free(rx_cmd_desc) auto cleanup by __free, so whole error path submit_err_exit can be removed and use desc_prepare_err_exit label. --- drivers/i2c/busses/i2c-imx-lpi2c.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-im= x-lpi2c.c index 03b5a7e8c361abe1d75fb4d31f9614bbc6387d93..e31c2d81f59f18a09d34f79896a= 7fa4bb83c0a12 100644 --- a/drivers/i2c/busses/i2c-imx-lpi2c.c +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c @@ -722,7 +722,7 @@ static void lpi2c_dma_callback(void *data) =20 static int lpi2c_dma_rx_cmd_submit(struct lpi2c_imx_struct *lpi2c_imx) { - struct dma_async_tx_descriptor *rx_cmd_desc; + struct dma_async_tx_descriptor *rx_cmd_desc __free(dma_async_tx_descripto= r) =3D NULL; struct lpi2c_imx_dma *dma =3D lpi2c_imx->dma; struct dma_chan *txchan =3D dma->chan_tx; dma_cookie_t cookie; @@ -746,10 +746,11 @@ static int lpi2c_dma_rx_cmd_submit(struct lpi2c_imx_s= truct *lpi2c_imx) cookie =3D dmaengine_submit(rx_cmd_desc); if (dma_submit_error(cookie)) { dev_err(&lpi2c_imx->adapter.dev, "submitting DMA failed, use pio\n"); - goto submit_err_exit; + goto desc_prepare_err_exit; } =20 dma_async_issue_pending(txchan); + retain_and_null_ptr(rx_cmd_desc); =20 return 0; =20 @@ -757,12 +758,6 @@ static int lpi2c_dma_rx_cmd_submit(struct lpi2c_imx_st= ruct *lpi2c_imx) dma_unmap_single(txchan->device->dev, dma->dma_tx_addr, dma->rx_cmd_buf_len, DMA_TO_DEVICE); return -EINVAL; - -submit_err_exit: - dma_unmap_single(txchan->device->dev, dma->dma_tx_addr, - dma->rx_cmd_buf_len, DMA_TO_DEVICE); - dmaengine_desc_free(rx_cmd_desc); - return -EINVAL; } =20 static int lpi2c_dma_submit(struct lpi2c_imx_struct *lpi2c_imx) --=20 2.34.1