[PATCH 2/2] x86/PCI: Disable IO/MEM decoding for ROM BARs for devices with non-compliant BARs
After executing quirk patches for the Broadwell-EP Home Agents, the following errors are in the boot log: pci :ff:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] For the PCI ROM device's memory resource (BAR 6), pci_read_bases() initializes the value of res->flags. Later in the boot, pcibios_assign_resources() attempts to assign uninitialized resources, and calls pcibios_allocate_dev_rom_resource(). That function uses the res->flags field to determine if the rom resource has been initialized. The code then attempts to assign a resource to the rom BAR and the "failed to assign" messages are output to the log. This patch moves the non_compliant_bars check to pci_read_bases() so it covers all the BARs of a non-compliant device. Fixes: b84106b4e229 ("PCI: Disable IO/MEM decoding for devices with non-compliant BARs") Cc: Bjorn HelgaasCc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x...@kernel.org Cc: linux-kernel@vger.kernel.org Cc: Andi Kleen Signed-off-by: Prarit Bhargava --- drivers/pci/probe.c |6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 8004f67c57ec..bf8405fb4ace 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -179,9 +179,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, u16 orig_cmd; struct pci_bus_region region, inverted_region; - if (dev->non_compliant_bars) - return 0; - mask = type ? PCI_ROM_ADDRESS_MASK : ~0; /* No printks while decoding is disabled! */ @@ -322,6 +319,9 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom) { unsigned int pos, reg; + if (dev->non_compliant_bars) + return; + for (pos = 0; pos < howmany; pos++) { struct resource *res = >resource[pos]; reg = PCI_BASE_ADDRESS_0 + (pos << 2); -- 1.7.9.3
[PATCH 2/2] x86/PCI: Disable IO/MEM decoding for ROM BARs for devices with non-compliant BARs
After executing quirk patches for the Broadwell-EP Home Agents, the following errors are in the boot log: pci :ff:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] For the PCI ROM device's memory resource (BAR 6), pci_read_bases() initializes the value of res->flags. Later in the boot, pcibios_assign_resources() attempts to assign uninitialized resources, and calls pcibios_allocate_dev_rom_resource(). That function uses the res->flags field to determine if the rom resource has been initialized. The code then attempts to assign a resource to the rom BAR and the "failed to assign" messages are output to the log. This patch moves the non_compliant_bars check to pci_read_bases() so it covers all the BARs of a non-compliant device. Fixes: b84106b4e229 ("PCI: Disable IO/MEM decoding for devices with non-compliant BARs") Cc: Bjorn Helgaas Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x...@kernel.org Cc: linux-kernel@vger.kernel.org Cc: Andi Kleen Signed-off-by: Prarit Bhargava --- drivers/pci/probe.c |6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 8004f67c57ec..bf8405fb4ace 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -179,9 +179,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, u16 orig_cmd; struct pci_bus_region region, inverted_region; - if (dev->non_compliant_bars) - return 0; - mask = type ? PCI_ROM_ADDRESS_MASK : ~0; /* No printks while decoding is disabled! */ @@ -322,6 +319,9 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom) { unsigned int pos, reg; + if (dev->non_compliant_bars) + return; + for (pos = 0; pos < howmany; pos++) { struct resource *res = >resource[pos]; reg = PCI_BASE_ADDRESS_0 + (pos << 2); -- 1.7.9.3
[PATCH 2/2] x86/PCI: Disable IO/MEM decoding for ROM BARs for devices with non-compliant BARs
After executing quirk patches for the Broadwell-EP Home Agents, the following errors are in the boot log: pci :ff:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] For the PCI ROM device's memory resource (BAR 6), pci_read_bases() initializes the value of res->flags. Later in the boot, pcibios_assign_resources() attempts to assign uninitialized resources, and calls pcibios_allocate_dev_rom_resource(). That function uses the res->flags field to determine if the rom resource has been initialized. The code then attempts to assign a resource to the rom BAR and the "failed to assign" messages are output to the log. This patch moves the non_compliant_bars check to pci_read_bases() so it covers all the BARs of a non-compliant device. Fixes: b84106b4e229 ("PCI: Disable IO/MEM decoding for devices with non-compliant BARs") Cc: Bjorn HelgaasCc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x...@kernel.org Cc: linux-kernel@vger.kernel.org Cc: Andi Kleen Signed-off-by: Prarit Bhargava --- drivers/pci/probe.c |6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 8004f67c57ec..bf8405fb4ace 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -179,9 +179,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, u16 orig_cmd; struct pci_bus_region region, inverted_region; - if (dev->non_compliant_bars) - return 0; - mask = type ? PCI_ROM_ADDRESS_MASK : ~0; /* No printks while decoding is disabled! */ @@ -322,6 +319,9 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom) { unsigned int pos, reg; + if (dev->non_compliant_bars) + return; + for (pos = 0; pos < howmany; pos++) { struct resource *res = >resource[pos]; reg = PCI_BASE_ADDRESS_0 + (pos << 2); -- 1.7.9.3
[PATCH 2/2] x86/PCI: Disable IO/MEM decoding for ROM BARs for devices with non-compliant BARs
After executing quirk patches for the Broadwell-EP Home Agents, the following errors are in the boot log: pci :ff:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :ff:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.0: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:12.4: BAR 6: failed to assign [mem size 0x0001 pref] pci :7f:1e.3: BAR 6: failed to assign [mem size 0x0001 pref] For the PCI ROM device's memory resource (BAR 6), pci_read_bases() initializes the value of res->flags. Later in the boot, pcibios_assign_resources() attempts to assign uninitialized resources, and calls pcibios_allocate_dev_rom_resource(). That function uses the res->flags field to determine if the rom resource has been initialized. The code then attempts to assign a resource to the rom BAR and the "failed to assign" messages are output to the log. This patch moves the non_compliant_bars check to pci_read_bases() so it covers all the BARs of a non-compliant device. Fixes: b84106b4e229 ("PCI: Disable IO/MEM decoding for devices with non-compliant BARs") Cc: Bjorn Helgaas Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: x...@kernel.org Cc: linux-kernel@vger.kernel.org Cc: Andi Kleen Signed-off-by: Prarit Bhargava --- drivers/pci/probe.c |6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 8004f67c57ec..bf8405fb4ace 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -179,9 +179,6 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, u16 orig_cmd; struct pci_bus_region region, inverted_region; - if (dev->non_compliant_bars) - return 0; - mask = type ? PCI_ROM_ADDRESS_MASK : ~0; /* No printks while decoding is disabled! */ @@ -322,6 +319,9 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom) { unsigned int pos, reg; + if (dev->non_compliant_bars) + return; + for (pos = 0; pos < howmany; pos++) { struct resource *res = >resource[pos]; reg = PCI_BASE_ADDRESS_0 + (pos << 2); -- 1.7.9.3