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| author | Srikanth Thokala <sthokal@xilinx.com> | 2013-12-07 13:40:49 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-09 21:02:25 -0500 |
| commit | ec21b6b404dd850a23952ee3b871ff676c0703fa (patch) | |
| tree | 59d076a2697c3e3d438a4ef24755c58cf278d30d | |
| parent | 243fedd5fa4a4a72caae7bde3f0bd0354a256b88 (diff) | |
| download | op-kernel-dev-ec21b6b404dd850a23952ee3b871ff676c0703fa.zip op-kernel-dev-ec21b6b404dd850a23952ee3b871ff676c0703fa.tar.gz | |
net: emaclite: add barriers to support Xilinx Zynq platform
This patch adds barriers at appropriate places to ensure the driver
works on Xilinx Zynq ARM-based SoC platform.
Signed-off-by: Srikanth Thokala <sthokal@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/xilinx/xilinx_emaclite.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c index b2850fd..fefb8cd 100644 --- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c +++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c @@ -220,6 +220,13 @@ static void xemaclite_aligned_write(void *src_ptr, u32 *dest_ptr, *to_u16_ptr++ = *from_u16_ptr++; *to_u16_ptr++ = *from_u16_ptr++; + /* This barrier resolves occasional issues seen around + * cases where the data is not properly flushed out + * from the processor store buffers to the destination + * memory locations. + */ + wmb(); + /* Output a word */ *to_u32_ptr++ = align_buffer; } @@ -235,6 +242,12 @@ static void xemaclite_aligned_write(void *src_ptr, u32 *dest_ptr, for (; length > 0; length--) *to_u8_ptr++ = *from_u8_ptr++; + /* This barrier resolves occasional issues seen around + * cases where the data is not properly flushed out + * from the processor store buffers to the destination + * memory locations. + */ + wmb(); *to_u32_ptr = align_buffer; } } |
