]> git.ipfire.org Git - thirdparty/kernel/linux.git/commit
PCI: Use resource_set_range() that correctly sets ->end
authorIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Mon, 8 Dec 2025 14:56:54 +0000 (16:56 +0200)
committerBjorn Helgaas <bhelgaas@google.com>
Tue, 23 Dec 2025 22:05:01 +0000 (16:05 -0600)
commit11721c45a8266a9d0c9684153d20e37159465f96
tree10c9bcc5351af3e4cafb1f463fd5d66f4327353d
parent8f0b4cce4481fb22653697cced8d0d04027cb1e8
PCI: Use resource_set_range() that correctly sets ->end

__pci_read_base() sets resource start and end addresses when resource
is larger than 4G but pci_bus_addr_t or resource_size_t are not capable
of representing 64-bit PCI addresses. This creates a problematic
resource that has non-zero flags but the start and end addresses do not
yield to resource size of 0 but 1.

Replace custom resource addresses setup with resource_set_range()
that correctly sets end address as -1 which results in resource_size()
returning 0.

For consistency, also use resource_set_range() in the other branch that
does size based resource setup.

Fixes: 23b13bc76f35 ("PCI: Fail safely if we can't handle BARs larger than 4GB")
Link: https://lore.kernel.org/all/20251207215359.28895-1-ansuelsmth@gmail.com/T/#m990492684913c5a158ff0e5fc90697d8ad95351b
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: stable@vger.kernel.org
Cc: Christian Marangi <ansuelsmth@gmail.com>
Link: https://patch.msgid.link/20251208145654.5294-1-ilpo.jarvinen@linux.intel.com
drivers/pci/probe.c