diff options
| author | Liming Sun <[email protected]> | 2021-05-07 20:30:12 -0400 |
|---|---|---|
| committer | Hans de Goede <[email protected]> | 2021-05-19 15:24:52 +0200 |
| commit | 1c0e5701c5e792c090aef0e5b9b8923c334d9324 (patch) | |
| tree | da8834c666b89c3898ced373638c25a2dcbf9e4c /drivers/fpga/fpga-bridge.c | |
| parent | 9795d8232a24be9e1e1cc408a6bdc01c40e2cedc (diff) | |
platform/mellanox: mlxbf-tmfifo: Fix a memory barrier issue
The virtio framework uses wmb() when updating avail->idx. It
guarantees the write order, but not necessarily loading order
for the code accessing the memory. This commit adds a load barrier
after reading the avail->idx to make sure all the data in the
descriptor is visible. It also adds a barrier when returning the
packet to virtio framework to make sure read/writes are visible to
the virtio code.
Fixes: 1357dfd7261f ("platform/mellanox: Add TmFifo driver for Mellanox BlueField Soc")
Signed-off-by: Liming Sun <[email protected]>
Reviewed-by: Vadim Pasternak <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Hans de Goede <[email protected]>
Diffstat (limited to 'drivers/fpga/fpga-bridge.c')
0 files changed, 0 insertions, 0 deletions