From: rmk+kernel@arm.linux.org.uk (Russell King) Date: Thu, 01 Aug 2013 23:07:11 +0100 Subject: [PATCH RFC 33/51] DMA-API: net: nxp/lpc_eth: use dma_coerce_mask_and_coherent() In-Reply-To: <20130801213420.GL23006@n2100.arm.linux.org.uk> References: <20130801213420.GL23006@n2100.arm.linux.org.uk> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The code sequence: pldat->pdev->dev.coherent_dma_mask = 0xFFFFFFFF; pldat->pdev->dev.dma_mask = &pldat->pdev->dev.coherent_dma_mask; bypasses the architectures check on the DMA mask. It can be replaced with dma_coerce_mask_and_coherent(), avoiding the direct initialization of this mask. Signed-off-by: Russell King --- drivers/net/ethernet/nxp/lpc_eth.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c index a061b93..ba3ca18 100644 --- a/drivers/net/ethernet/nxp/lpc_eth.c +++ b/drivers/net/ethernet/nxp/lpc_eth.c @@ -1399,8 +1399,10 @@ static int lpc_eth_drv_probe(struct platform_device *pdev) } if (pldat->dma_buff_base_v == 0) { - pldat->pdev->dev.coherent_dma_mask = 0xFFFFFFFF; - pldat->pdev->dev.dma_mask = &pldat->pdev->dev.coherent_dma_mask; + ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) + goto err_out_free_irq; + pldat->dma_buff_size = PAGE_ALIGN(pldat->dma_buff_size); /* Allocate a chunk of memory for the DMA ethernet buffers -- 1.7.4.4