ibmvnic: add memory barrier to protect long term buffer

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dma_rmb() barrier is added to load the long term buffer before copying
it to socket buffer; and dma_wmb() barrier is added to update the
long term buffer before it being accessed by VIOS (virtual i/o server).

Fixes: 032c5e8284 ("Driver for IBM System i/p VNIC protocol")
Signed-off-by: Lijun Pan <ljp@linux.ibm.com>
Acked-by: Thomas Falcon <tlfalcon@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Lijun Pan 2021-02-12 20:48:40 -06:00 • committed by David S. Miller

parent 7ce189faa7

commit 42557dab78

1 changed files with 5 additions and 0 deletions

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drivers/net/ethernet/ibm/ibmvnic.c

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