diff options
| author |   Zumeng Chen <zumeng.chen@windriver.com> | 2016-11-28 21:55:00 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-11-29 20:33:55 -0500 |
| commit | ffac0e967f20b7637936dbaa21df08c55f672604 (patch) | |
| tree | 0b79a616d557f4646a717cebc75911a3803670bf /net/dccp | |
| parent | net: macb: fix the RX queue reset in macb_rx() (diff) | |
| download | linux-dev-ffac0e967f20b7637936dbaa21df08c55f672604.tar.xz linux-dev-ffac0e967f20b7637936dbaa21df08c55f672604.zip | |
net: macb: ensure ordering write to re-enable RX smoothly
When a hardware issue happened as described by inline comments, the register
write pattern looks like the following:
<write ~MACB_BIT(RE)>
+ wmb();
<write MACB_BIT(RE)>
There might be a memory barrier between these two write operations, so add wmb
to ensure an flip from 0 to 1 for NCR.
Signed-off-by: Zumeng Chen <zumeng.chen@windriver.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
0 files changed, 0 insertions, 0 deletions