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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>
This commit is contained in:
Srikanth Thokala 2013-12-07 13:40:49 +05:30 committed by David S. Miller
parent 243fedd5fa
commit ec21b6b404
1 changed files with 13 additions and 0 deletions
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13
drivers/net/ethernet/xilinx/xilinx_emaclite.c
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@ -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;
}
}