6e90ff540a
[ Upstream commit 1c0e5701c5e792c090aef0e5b9b8923c334d9324 ]
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:
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| .. | ||
| Kconfig | ||
| Makefile | ||
| mlxbf-tmfifo-regs.h | ||
| mlxbf-tmfifo.c | ||
| mlxreg-hotplug.c | ||
| mlxreg-io.c | ||