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PCI: Don't disable decoding when mmio_always_on is set

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[ Upstream commit b6caa1d8c8 ]

Don't disable MEM/IO decoding when a device have both non_compliant_bars
and mmio_always_on.

That would allow us quirk devices with junk in BARs but can't disable
their decoding.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Acked-by: Bjorn Helgaas <helgaas@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiaxun Yang
2020-05-26 17:21:12 +08:00
committed by Chris
parent 1e6da8bf4e
commit 8ef925f582
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/probe.c
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@@ -1251,7 +1251,7 @@ int pci_setup_device(struct pci_dev *dev)
/* device class may be changed after fixup */
class = dev->class >> 8;
if (dev->non_compliant_bars) {
if (dev->non_compliant_bars && !dev->mmio_always_on) {
pci_read_config_word(dev, PCI_COMMAND, &cmd);
if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
dev_info(&dev->dev, "device has non-compliant BARs; disabling IO/MEM decoding\n");