diff options
| author | Michal Simek <michal.simek@xilinx.com> | 2018-09-25 08:32:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-10 07:42:42 -0800 |
| commit | 05bdb6d96456e36fe962dc62856d9aab3a87b70b (patch) | |
| tree | f95d8bf38a1e5f447f36f9bb4ccfe8fced6fad78 /drivers/net/ethernet | |
| parent | 8114c2b2806584d01f9c98c64765be3e3df4527f (diff) | |
net: macb: Clean 64b dma addresses if they are not detected
[ Upstream commit e1e5d8a9fe737d94ccc0ccbaf0c97f69a8f3e000 ]
Clear ADDR64 dma bit in DMACFG register in case that HW_DMA_CAP_64B is
not detected on 64bit system.
The issue was observed when bootloader(u-boot) does not check macb
feature at DCFG6 register (DAW64_OFFSET) and enabling 64bit dma support
by default. Then macb driver is reading DMACFG register back and only
adding 64bit dma configuration but not cleaning it out.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index 8f55c23e9821..a0d640243df2 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -1737,6 +1737,7 @@ static void macb_configure_dma(struct macb *bp) else dmacfg &= ~GEM_BIT(TXCOEN); + dmacfg &= ~GEM_BIT(ADDR64); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT dmacfg |= GEM_BIT(ADDR64); #endif |