pull request for Eoan raspi2 kernel (respin to the latest commit (2a085c9b42ea) of https://github.com/raspberrypi/linux.git rpi-5.3.y branch)

[Paolo Pisati]

On Fri, Oct 25, 2019 at 4:10 AM Hui Wang <hui.wang at canonical.com> wrote:
>
> BugLink: https://bugs.launchpad.net/bugs/1849623
>
> [Impact]
> https://bugs.launchpad.net/bugs/1848790
> https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1848703
> Recently we had 2 bugs about the usb host on rpi4 with 4G ram, and I found
> the kernel in the github already had the fix for this issue, and besides
> this
> fix, it also had 106 more patches than our eoan kernel, those patches were
> merged during or after we prepared our eoan kernel, now let us pick those
> patches to our eoan too.
>
> [Fix]
> For the usb host issue, it adds a fix by setting the usb dma bounce buffer
> under 1G.
>
> [Test Case]
> some users and I alreaady tested the armhf and arm64 kernel on pi4 and pi3
> boards, the usb host worked well and no other regressions introduced.
>
> [Regression Risk]
> Low, these patches are from the github which is the pi official kernel
> repository. And we already tested armhf and arm64 kernel on pi4/3 boards.

Clean cherry picks from the official RaspberryPi tree, hence:

Acked-by: Paolo Pisati <paolo.pisati at canonical.com>

x Wang: next time, try to use a univoke branch name (e.g.
eoan-raspi2-lp$BUGNUMBER), since using a past release like
Ubuntu-raspi2-5.3.0-1009.10 (and thus a tag present in our tree),
might confuse people trying to fetch/apply it