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authorChristoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>2015-12-23 16:51:57 +0100
committerBjorn Helgaas <bhelgaas@google.com>2016-01-06 22:37:55 +0100
commit3460baa620685c20f5ee19afb6d99d26150c382c (patch)
treec287d0ffcd0a33ac3268dbe20ba3d1b17a91000a /drivers/pci/bus.c
parentLinux 4.4-rc2 (diff)
downloadlinux-3460baa620685c20f5ee19afb6d99d26150c382c.tar.xz
linux-3460baa620685c20f5ee19afb6d99d26150c382c.zip
PCI: Fix minimum allocation address overwrite
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@manchmal.in-ulm.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v3.14+
Diffstat (limited to 'drivers/pci/bus.c')
-rw-r--r--drivers/pci/bus.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index d3346d23963b..89b3befc7155 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -140,6 +140,8 @@ static int pci_bus_alloc_from_region(struct pci_bus *bus, struct resource *res,
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(struct pci_bus *bus, struct resource *res,
* 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;