Search Linux Wireless

[PATCH v2] bcma: use of_dma_configure() to set initial dma mask

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



While fixing another bug, I noticed that bcma manually sets up
a dma_mask pointer for its child devices. We have a generic
helper for that now, which should be able to cope better with
any variations that might be needed to deal with cache coherency,
unusual DMA address offsets, iommus, or limited DMA masks, none
of which are currently handled here.

This changes the core to use the of_dma_configure(), like
we do for platform devices that are probed directly from
DT.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
This patch needs to be tested to ensure we don't introduce
regressions, and should probably go into 4.7 as a cleanup.

v2: fix typo

 drivers/bcma/main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 1f635471f318..2c1798e38abd 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -209,6 +209,8 @@ static void bcma_of_fill_device(struct platform_device *parent,
 		core->dev.of_node = node;
 
 	core->irq = bcma_of_get_irq(parent, core, 0);
+
+	of_dma_configure(&core->dev, node);
 }
 
 unsigned int bcma_core_irq(struct bcma_device *core, int num)
@@ -248,12 +250,12 @@ void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
 		core->irq = bus->host_pci->irq;
 		break;
 	case BCMA_HOSTTYPE_SOC:
-		core->dev.dma_mask = &core->dev.coherent_dma_mask;
-		if (bus->host_pdev) {
+		if (IS_ENABLED(CONFIG_OF) && bus->host_pdev) {
 			core->dma_dev = &bus->host_pdev->dev;
 			core->dev.parent = &bus->host_pdev->dev;
 			bcma_of_fill_device(bus->host_pdev, core);
 		} else {
+			core->dev.dma_mask = &core->dev.coherent_dma_mask;
 			core->dma_dev = &core->dev;
 		}
 		break;
-- 
2.7.0

--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Host AP]     [ATH6KL]     [Linux Wireless Personal Area Network]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Linux Kernel]     [IDE]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Hiking]     [MIPS Linux]     [ARM Linux]     [Linux RAID]

  Powered by Linux