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| author |   Michal Simek <michal.simek@xilinx.com> | 2018-09-25 08:32:50 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-09-25 10:33:06 -0700 |
| commit | bd6207202db8974ca3d3183ca0d5611d45b2973c (patch) | |
| tree | dddcf8937252cdad9cdada68fd9a5f238323e239 /drivers/net/ethernet/cadence/macb_main.c | |
| parent | Merge branch 'r8169-series-with-smaller-improvements' (diff) | |
| download | linux-dev-bd6207202db8974ca3d3183ca0d5611d45b2973c.tar.xz linux-dev-bd6207202db8974ca3d3183ca0d5611d45b2973c.zip | |
net: macb: Clean 64b dma addresses if they are not detected
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>
Diffstat (limited to 'drivers/net/ethernet/cadence/macb_main.c')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 7fddf76e6ead..0acaef3ef548 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -2159,6 +2159,7 @@ static void macb_configure_dma(struct macb *bp) else dmacfg &= ~GEM_BIT(TXCOEN); + dmacfg &= ~GEM_BIT(ADDR64); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (bp->hw_dma_cap & HW_DMA_CAP_64B) dmacfg |= GEM_BIT(ADDR64); |