This is a note to let you know that I've just added the patch titled
PCI: of: Don't fail devm_pci_alloc_host_bridge() on missing 'ranges'
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-of-don-t-fail-devm_pci_alloc_host_bridge-on-miss.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 42952b952673603666f4a6644602d3b9942f64fc
Author: Rob Herring <robh@xxxxxxxxxx>
Date: Tue Aug 3 15:56:55 2021 -0600
PCI: of: Don't fail devm_pci_alloc_host_bridge() on missing 'ranges'
[ Upstream commit d277f6e88c88729b1d57d40bbfb00d0bfc961972 ]
Commit 669cbc708122 ("PCI: Move DT resource setup into
devm_pci_alloc_host_bridge()") made devm_pci_alloc_host_bridge() fail on
any DT resource parsing errors, but Broadcom iProc uses
devm_pci_alloc_host_bridge() on BCMA bus devices that don't have DT
resources. In particular, there is no 'ranges' property. Fix iProc by
making 'ranges' optional.
If 'ranges' is required by a platform, there's going to be more errors
latter on if it is missing.
Link: https://lore.kernel.org/r/20210803215656.3803204-1-robh@xxxxxxxxxx
Fixes: 669cbc708122 ("PCI: Move DT resource setup into devm_pci_alloc_host_bridge()")
Reported-by: Rafał Miłecki <zajec5@xxxxxxxxx>
Tested-by: Rafał Miłecki <rafal@xxxxxxxxxx>
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Srinath Mannam <srinath.mannam@xxxxxxxxxxxx>
Cc: Roman Bacik <roman.bacik@xxxxxxxxxxxx>
Cc: Bharat Gooty <bharat.gooty@xxxxxxxxxxxx>
Cc: Abhishek Shah <abhishek.shah@xxxxxxxxxxxx>
Cc: Jitendra Bhivare <jitendra.bhivare@xxxxxxxxxxxx>
Cc: Ray Jui <ray.jui@xxxxxxxxxxxx>
Cc: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: BCM Kernel Feedback <bcm-kernel-feedback-list@xxxxxxxxxxxx>
Cc: Scott Branden <sbranden@xxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index ac24cd5439a9..3f6ef2f45e57 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -295,7 +295,7 @@ static int devm_of_pci_get_host_bridge_resources(struct device *dev,
/* Check for ranges property */
err = of_pci_range_parser_init(&parser, dev_node);
if (err)
- goto failed;
+ return 0;
dev_dbg(dev, "Parsing ranges property...\n");
for_each_of_pci_range(&parser, &range) {
