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[ena] Add memory barrier after writing to on-device memory

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Ensure that writes to on-device memory have taken place before writing
to the doorbell register.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-10-17 12:34:03 +01:00
parent c296747d0e
commit 0ae5e25de2
1 changed files with 1 additions and 0 deletions
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src/drivers/net/ena.c
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@@ -1125,6 +1125,7 @@ static int ena_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) {
dest = ( ena->tx.sq.llqe + ( index * sizeof ( *llqe ) ) ); dest = ( ena->tx.sq.llqe + ( index * sizeof ( *llqe ) ) );
for ( i = 0 ; i < ( sizeof ( *llqe ) / sizeof ( *src ) ); i++ ) for ( i = 0 ; i < ( sizeof ( *llqe ) / sizeof ( *src ) ); i++ )
writeq ( *(src++), dest++ ); writeq ( *(src++), dest++ );
wmb();
} }
/* Increment producer counter */ /* Increment producer counter */