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MIPS: Octeon: Put restrictions on DMA descriptors. 

Set the DMA mask such that all descriptors stay in the
lower 4GB of memory.

Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13830/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Steven J. Hill 2016-07-26 10:26:23 -05:00 committed by Ralf Baechle
parent 71471e2866
commit 8552b5b4da
1 changed files with 5 additions and 1 deletions
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6
arch/mips/cavium-octeon/octeon-platform.c
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@ -311,7 +311,11 @@ static struct usb_ehci_pdata octeon_ehci_pdata = {
#ifdef __BIG_ENDIAN
.big_endian_mmio = 1,
#endif
.dma_mask_64 = 1,
/*
* We can DMA from anywhere. But the descriptors must be in
* the lower 4GB.
*/
.dma_mask_64 = 0,
.power_on = octeon_ehci_power_on,
.power_off = octeon_ehci_power_off,
};