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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 03:43:32 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 03:43:32 +0000 |
| commit | f530fbb7a18f2794e4178dfb7cd07719b9586147 (patch) | |
| tree | 3f704b17427743e26452771cf7da2ed110346ddd /drivers/pci/setup-res.c | |
| parent | Adding debian version 4.19.260-1. (diff) | |
| download | linux-f530fbb7a18f2794e4178dfb7cd07719b9586147.tar.xz linux-f530fbb7a18f2794e4178dfb7cd07719b9586147.zip | |
Merging upstream version 4.19.269.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/pci/setup-res.c')
| -rw-r--r-- | drivers/pci/setup-res.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index d21fa04fa..c35c61816 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -209,6 +209,17 @@ static int pci_revert_fw_address(struct resource *res, struct pci_dev *dev, root = pci_find_parent_resource(dev, res); if (!root) { + /* + * If dev is behind a bridge, accesses will only reach it + * if res is inside the relevant bridge window. + */ + if (pci_upstream_bridge(dev)) + return -ENXIO; + + /* + * On the root bus, assume the host bridge will forward + * everything. + */ if (res->flags & IORESOURCE_IO) root = &ioport_resource; else |