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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-06-27 13:49:14 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-10-31 14:48:59 +0000 |
| commit | 93b11b2584ab6832cb279db731daa58442baac65 (patch) | |
| tree | df29276d4fba6a7e9a3a6853255ae7ee670b0052 /drivers | |
| parent | 26741a69d1a5e99c4acfea1f5b1d1e652516d4ca (diff) | |
| download | lwn-93b11b2584ab6832cb279db731daa58442baac65.tar.gz lwn-93b11b2584ab6832cb279db731daa58442baac65.zip | |
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 <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/parport/parport_pc.c | 8 |
1 files 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); |