generic: 5.15: copy config and patch from 5.10

Copy config and patches from kernel 5.10 to kernel 5.15

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/target/linux/generic/pending-5.15/850-0022-PCI-aardvark-Update-comment-about-link-going-down-af.patch b/target/linux/generic/pending-5.15/850-0022-PCI-aardvark-Update-comment-about-link-going-down-af.patch
new file mode 100644
index 0000000000..cc489ebc8a
--- /dev/null
+++ b/target/linux/generic/pending-5.15/850-0022-PCI-aardvark-Update-comment-about-link-going-down-af.patch
@@ -0,0 +1,35 @@
+From bafda858364003a70b9cda84282f9761587f8033 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org>
+Date: Mon, 10 Jan 2022 00:47:38 +0100
+Subject: [PATCH] PCI: aardvark: Update comment about link going down after
+ link-up
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Update the comment about what happens when link goes down after we have
+checked for link-up. If a PIO request is done while link-down, we have
+a serious problem.
+
+Signed-off-by: Marek Behún <kabel@kernel.org>
+---
+ drivers/pci/controller/pci-aardvark.c | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+--- a/drivers/pci/controller/pci-aardvark.c
++++ b/drivers/pci/controller/pci-aardvark.c
+@@ -1005,8 +1005,12 @@ static bool advk_pcie_valid_device(struc
+ 		return false;
+ 
+ 	/*
+-	 * If the link goes down after we check for link-up, nothing bad
+-	 * happens but the config access times out.
++	 * If the link goes down after we check for link-up, we have a problem:
++	 * if a PIO request is executed while link-down, the whole controller
++	 * gets stuck in a non-functional state, and even after link comes up
++	 * again, PIO requests won't work anymore, and a reset of the whole PCIe
++	 * controller is needed. Therefore we need to prevent sending PIO
++	 * requests while the link is down.
+ 	 */
+ 	if (!pci_is_root_bus(bus) && !advk_pcie_link_up(pcie))
+ 		return false;