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| author | Michal Simek <michal.simek@xilinx.com> | 2018-09-25 09:32:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-04 16:52:38 +0300 |
| commit | d9e742766c763db1e8ead9a9fbd7640232735ede (patch) | |
| tree | b9ba1b4d25d20228e7da1cefd8ce569708d58afe /drivers/net/ethernet/cadence | |
| parent | a5bdfc6892b5f6c4d131c246771dc67a55460691 (diff) | |
| download | linux-d9e742766c763db1e8ead9a9fbd7640232735ede.tar.xz | |
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/cadence')
| -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 b4f92de1efbd..d6f8d6c8b0f1 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -2000,6 +2000,7 @@ 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); |