From: Ioana Radulescu <ruxandra.radule...@nxp.com> Date: Thu, 23 May 2019 17:38:22 +0300
> This reverts commit f8b995853444aba9c16c1ccdccdd397527fde96d. > > The reverted change instructed the QMan hardware block to fetch > RX frame annotation and beginning of frame data to cache before > the core would read them. > > It turns out that in rare cases, it's possible that a QMan > stashing transaction is delayed long enough such that, by the time > it gets executed, the frame in question had already been dequeued > by the core and software processing began on it. If the core > manages to unmap the frame buffer _before_ the stashing transaction > is executed, an SMMU exception will be raised. > > Unfortunately there is no easy way to work around this while keeping > the performance advantages brought by QMan stashing, so disable > it altogether. > > Signed-off-by: Ioana Radulescu <ruxandra.radule...@nxp.com> Applied.
