diff options
| author | Chunfeng Yun <[email protected]> | 2021-12-18 17:57:47 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2021-12-21 09:05:44 +0100 |
| commit | a7aae769ca626819a7f9f078ebdc69a8a1b00c81 (patch) | |
| tree | 602a8f6ab6e97a5192df7f8159ee92d53e4e0f7e /lib/netdev-notifier-error-inject.c | |
| parent | e3d4621c22f90c33321ae6a6baab60cdb8e5a77c (diff) | |
usb: mtu3: add memory barrier before set GPD's HWO
There is a seldom issue that the controller access invalid address
and trigger devapc or emimpu violation. That is due to memory access
is out of order and cause gpd data is not correct.
Add mb() to prohibit compiler or cpu from reordering to make sure GPD
is fully written before setting its HWO.
Fixes: 48e0d3735aa5 ("usb: mtu3: supports new QMU format")
Cc: [email protected]
Reported-by: Eddie Hung <[email protected]>
Signed-off-by: Chunfeng Yun <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'lib/netdev-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions