From c015516392a271e179e4f898908c402ec93ce13a Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Thu, 1 May 2025 17:01:59 +0200 Subject: [PATCH 104/112] spi: atmel-quadspi: Fix printed error code during DMA setup On dma_request_chan() failure driver NULL-ifies the 'rx_chan' and immediately uses it as PTR_ERR() so dev_err_probe() prints incorrect error code. Rework the code so proper error code will be printed and NULL-ifying of 'rx_chan' will happen in common error handling block (failure of DMA setup is not fatal for the driver and further code depends on 'rx_chan' being non-NULL for DMA operations). Reported by Smatch: drivers/spi/atmel-quadspi.c:1287 atmel_qspi_dma_init() warn: passing zero to 'PTR_ERR' Signed-off-by: Krzysztof Kozlowski Link: https://patch.msgid.link/20250501-n-smatch-fixes-v2-1-d2ad9c1f2e67@linaro.org Signed-off-by: Mark Brown --- drivers/spi/atmel-quadspi.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/drivers/spi/atmel-quadspi.c +++ b/drivers/spi/atmel-quadspi.c @@ -1259,9 +1259,9 @@ static int atmel_qspi_dma_init(struct sp aq->rx_chan = dma_request_chan(&aq->pdev->dev, "rx"); if (IS_ERR(aq->rx_chan)) { - aq->rx_chan = NULL; - return dev_err_probe(&aq->pdev->dev, PTR_ERR(aq->rx_chan), - "RX DMA channel is not available\n"); + ret = dev_err_probe(&aq->pdev->dev, PTR_ERR(aq->rx_chan), + "RX DMA channel is not available\n"); + goto null_rx_chan; } aq->tx_chan = dma_request_chan(&aq->pdev->dev, "tx"); @@ -1282,8 +1282,9 @@ static int atmel_qspi_dma_init(struct sp release_rx_chan: dma_release_channel(aq->rx_chan); - aq->rx_chan = NULL; aq->tx_chan = NULL; +null_rx_chan: + aq->rx_chan = NULL; return ret; }