From 93b11b2584ab6832cb279db731daa58442baac65 Mon Sep 17 00:00:00 2001 From: Russell King Date: Thu, 27 Jun 2013 13:49:14 +0100 Subject: DMA-API: parport: parport_pc.c: use dma_coerce_mask_and_coherent() The code sequence: dev->coherent_dma_mask = DMA_BIT_MASK(24); dev->dma_mask = &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/parport/parport_pc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c index 903e1285fda0..963761526229 100644 --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -2004,6 +2004,7 @@ struct parport *parport_pc_probe_port(unsigned long int base, struct resource *ECR_res = NULL; struct resource *EPP_res = NULL; struct platform_device *pdev = NULL; + int ret; if (!dev) { /* We need a physical device to attach to, but none was @@ -2014,8 +2015,11 @@ struct parport *parport_pc_probe_port(unsigned long int base, return NULL; dev = &pdev->dev; - dev->coherent_dma_mask = DMA_BIT_MASK(24); - dev->dma_mask = &dev->coherent_dma_mask; + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24)); + if (ret) { + dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n"); + dma = PARPORT_DMA_NONE; + } } ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL); -- cgit v1.2.3