diff options
| author | Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de> | 2015-12-23 16:51:57 +0100 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-02-03 14:01:43 -0500 |
| commit | 24ab3b8e796248bfbdb8a80469b9811b5df39caa (patch) | |
| tree | fb178ba9eafcec4f20476a001da47f078f5f9f0c /drivers/pci | |
| parent | 67d0df37bf4235bc3aa1866571e74437cba33199 (diff) | |
PCI: Fix minimum allocation address overwrite
[ Upstream commit 3460baa620685c20f5ee19afb6d99d26150c382c ]
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+
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/bus.c | 6 |
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; |