This is a note to let you know that I've just added the patch titled
of/address: use atomic allocation in pci_register_io_range()
to the 4.1-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:
of-address-use-atomic-allocation-in-pci_register_io_range.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 294240ffe784e951dc2ef070da04fa31ef6db3a0 Mon Sep 17 00:00:00 2001
From: Jingoo Han <jingoohan1@xxxxxxxxx>
Date: Thu, 18 Jun 2015 00:12:27 +0900
Subject: of/address: use atomic allocation in pci_register_io_range()
From: Jingoo Han <jingoohan1@xxxxxxxxx>
commit 294240ffe784e951dc2ef070da04fa31ef6db3a0 upstream.
When kzalloc() is called under spin_lock(), GFP_ATOMIC should be
used to avoid sleeping allocation.
The call tree is:
of_pci_range_to_resource()
--> pci_register_io_range() <-- takes spin_lock(&io_range_lock);
--> kzalloc()
Signed-off-by: Jingoo Han <jingoohan1@xxxxxxxxx>
Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/of/address.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -712,7 +712,7 @@ int __weak pci_register_io_range(phys_ad
}
/* add the range to the list */
- range = kzalloc(sizeof(*range), GFP_KERNEL);
+ range = kzalloc(sizeof(*range), GFP_ATOMIC);
if (!range) {
err = -ENOMEM;
goto end_register;
Patches currently in stable-queue which might be from jingoohan1@xxxxxxxxx are
queue-4.1/of-address-use-atomic-allocation-in-pci_register_io_range.patch
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