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During Tx cleanup it's still possible for the descriptor data to be read ahead of the descriptor index. A memory barrier is required between the read of the descriptor index and the start of the Tx cleanup loop. This allows a change to a lighter-weight barrier in the Tx transmit routine just before updating the current descriptor index. Since the memory barrier does result in extra overhead on arm64, keep the previous change to not chase the current descriptor value. This prevents the execution of the barrier for each loop performed. Suggested-by: Alexander Duyck <alexander.duyck@gmail.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| Makefile | ||
| xgbe-common.h | ||
| xgbe-dcb.c | ||
| xgbe-debugfs.c | ||
| xgbe-desc.c | ||
| xgbe-dev.c | ||
| xgbe-drv.c | ||
| xgbe-ethtool.c | ||
| xgbe-main.c | ||
| xgbe-mdio.c | ||
| xgbe-ptp.c | ||
| xgbe.h | ||