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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-06-27 11:10:40 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-10-31 14:48:44 +0000
commit4ffb4318b044d175709567402a65f8ebb19f5d3b (patch)
treeb7972104e18c19cefd03707adb18d884d720779b /drivers/usb
parente0a8ba2581ba832adac729d9ba48ee8561d65dc0 (diff)
downloadop-kernel-dev-4ffb4318b044d175709567402a65f8ebb19f5d3b.zip
op-kernel-dev-4ffb4318b044d175709567402a65f8ebb19f5d3b.tar.gz
DMA-API: usb: ohci-sa1111: add a note about DMA masks
Add a comment to explain why this driver doesn't call any of the DMA API dma_set_mask() functions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/ohci-sa1111.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-sa1111.c b/drivers/usb/host/ohci-sa1111.c
index 17b2a7d..aa9e127 100644
--- a/drivers/usb/host/ohci-sa1111.c
+++ b/drivers/usb/host/ohci-sa1111.c
@@ -185,6 +185,12 @@ static int ohci_hcd_sa1111_probe(struct sa1111_dev *dev)
if (usb_disabled())
return -ENODEV;
+ /*
+ * We don't call dma_set_mask_and_coherent() here because the
+ * DMA mask has already been appropraitely setup by the core
+ * SA-1111 bus code (which includes bug workarounds.)
+ */
+
hcd = usb_create_hcd(&ohci_sa1111_hc_driver, &dev->dev, "sa1111");
if (!hcd)
return -ENOMEM;
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