This is a note to let you know that I've just added the patch titled
PCI: Fix minimum allocation address overwrite
to the 4.4-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-fix-minimum-allocation-address-overwrite.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3460baa620685c20f5ee19afb6d99d26150c382c Mon Sep 17 00:00:00 2001
From: Christoph Biedl <linux-kernel.bfrz@xxxxxxxxxxxxxxxxxx>
Date: Wed, 23 Dec 2015 16:51:57 +0100
Subject: PCI: Fix minimum allocation address overwrite
From: Christoph Biedl <linux-kernel.bfrz@xxxxxxxxxxxxxxxxxx>
commit 3460baa620685c20f5ee19afb6d99d26150c382c upstream.
Commit 36e097a8a297 ("PCI: Split out bridge window override of minimum
allocation address") claimed to do no functional changes but unfortunately
did: The "min" variable is altered. At least the AVM A1 PCMCIA adapter was
no longer detected, breaking ISDN operation.
Use a local copy of "min" to restore the previous behaviour.
[bhelgaas: avoid gcc "?:" extension for portability and readability]
Fixes: 36e097a8a297 ("PCI: Split out bridge window override of minimum allocation address")
Signed-off-by: Christoph Biedl <linux-kernel.bfrz@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/bus.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -140,6 +140,8 @@ static int pci_bus_alloc_from_region(str
type_mask |= IORESOURCE_TYPE_BITS;
pci_bus_for_each_resource(bus, r, i) {
+ resource_size_t min_used = min;
+
if (!r)
continue;
@@ -163,12 +165,12 @@ static int pci_bus_alloc_from_region(str
* overrides "min".
*/
if (avail.start)
- min = avail.start;
+ min_used = avail.start;
max = avail.end;
/* Ok, try it out.. */
- ret = allocate_resource(r, res, size, min, max,
+ ret = allocate_resource(r, res, size, min_used, max,
align, alignf, alignf_data);
if (ret == 0)
return 0;
Patches currently in stable-queue which might be from linux-kernel.bfrz@xxxxxxxxxxxxxxxxxx are
queue-4.4/pci-fix-minimum-allocation-address-overwrite.patch
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