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net: stmmac: xgmac: Clear previous RX buffer size

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[ Upstream commit 11d55fd9975f8e46a0e5e19c14899544e81e1e15 ]

When switching between buffer sizes we need to clear the previous value.

Fixes: d6ddfacd95 ("net: stmmac: Add DMA related callbacks for XGMAC2")
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jose Abreu 2019-12-18 11:17:39 +01:00 • committed by Greg Kroah-Hartman
commit a762cc03c0
2 changed files with 4 additions and 1 deletions
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2
drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
View file

@ -343,6 +343,8 @@
#define XGMAC_DMA_CH_RX_CONTROL(x) (0x00003108 + (0x80 * (x)))
#define XGMAC_RxPBL GENMASK(21, 16)
#define XGMAC_RxPBL_SHIFT 16
#define XGMAC_RBSZ GENMASK(14, 1)
#define XGMAC_RBSZ_SHIFT 1
#define XGMAC_RXST BIT(0)
#define XGMAC_DMA_CH_TxDESC_HADDR(x) (0x00003110 + (0x80 * (x)))
#define XGMAC_DMA_CH_TxDESC_LADDR(x) (0x00003114 + (0x80 * (x)))

3
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
View file

@ -489,7 +489,8 @@ static void dwxgmac2_set_bfsize(void __iomem *ioaddr, int bfsize, u32 chan)
u32 value;
value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
value |= bfsize << 1;
value &= ~XGMAC_RBSZ;
value |= bfsize << XGMAC_RBSZ_SHIFT;
writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
}