On Thu, Feb 06, 2020 at 08:06:45PM +0100, gregkh@linuxfoundation.org wrote:
The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 6df19872d881641e6394f93ef2938cffcbdae5bb Mon Sep 17 00:00:00 2001 From: Yurii Monakov monakov.y@gmail.com Date: Tue, 17 Dec 2019 14:38:36 +0300 Subject: [PATCH] PCI: keystone: Fix link training retries initiation
ks_pcie_stop_link() function does not clear LTSSM_EN_VAL bit so link training was not triggered more than once after startup. In configurations where link can be unstable during early boot, for example, under low temperature, it will never be established.
Fixes: 0c4ffcfe1fbc ("PCI: keystone: Add TI Keystone PCIe driver") Signed-off-by: Yurii Monakov monakov.y@gmail.com Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Acked-by: Andrew Murray andrew.murray@arm.com Cc: stable@vger.kernel.org
The code got moved around by b492aca35c98 ("PCI: keystone: Merge pci-keystone-dw.c and pci-keystone.c"). I've fixed it up and queued for all branches.