Messages in this thread Patch in this message | | | From | Stefan Agner <> | Subject | [PATCH] net: fec: check DMA addressing limitations | Date | Wed, 1 Aug 2018 13:44:49 +0200 |
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Check DMA addressing limitations as suggested by the DMA API how-to. This does not fix a particular issue seen but is considered good style.
Signed-off-by: Stefan Agner <stefan@agner.ch> --- drivers/net/ethernet/freescale/fec_main.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index c729665107f5..af0fb200e936 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -3146,6 +3146,12 @@ static int fec_enet_init(struct net_device *ndev) fep->tx_align = 0x3; #endif + /* Check mask of the streaming and coherent API */ + if (dma_set_mask_and_coherent(&fep->pdev->dev, DMA_BIT_MASK(32))) { + dev_warn(&fep->pdev->dev, "No suitable DMA available\n"); + return -ENODEV; + } + fec_enet_alloc_queue(ndev); bd_size = (fep->total_tx_ring_size + fep->total_rx_ring_size) * dsize; -- 2.18.0
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