Commit 99b53323 authored by Christoph Biedl's avatar Christoph Biedl Committed by Sasha Levin

PCI: Fix minimum allocation address overwrite

[ Upstream commit 3460baa6 ]

Commit 36e097a8 ("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: 36e097a8 ("PCI: Split out bridge window override of minimum allocation address")
Signed-off-by: default avatarChristoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org      # v3.14+
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
parent aefd4d23
......@@ -146,6 +146,8 @@ 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;
......@@ -169,12 +171,12 @@ 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;
......
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