tree 52dccd870803855a4b530a6a7eb778bb97584ad3
parent 4b177f065e7ec37399b18e18412a8c7b75f8f299
author Ioana Radulescu <ruxandra.radulescu@nxp.com> 1570448308 +0300
committer David S. Miller <davem@davemloft.net> 1570457289 -0400

dpaa2-eth: Avoid unbounded while loops

Throughout the driver there are several places where we wait
indefinitely for DPIO portal commands to be executed, while
the portal returns a busy response code.

Even though in theory we are guaranteed the portals become
available eventually, in practice the QBMan hardware module
may become unresponsive in various corner cases.

Make sure we can never get stuck in an infinite while loop
by adding a retry counter for all portal commands.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>