As per PCIe spec, fast back-to-back transactions feature
is not applicable to PCIe devices. Hence, do not print
that fast back-to-back trasactions are disabled when
there is a PCIe device found on the bus
Signed-off-by: Vidya Sagar <vid...@nvidia.com>
---
v2:
* Modified has_pcie_dev type to bool and used pci_is_pcie() instead of
pci_pcie_cap()
* replaced printk with pr_info
arch/arm/kernel/bios32.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 17a26c1..d48d9d3 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -290,6 +290,7 @@ void pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev;
u16 features = PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
PCI_COMMAND_FAST_BACK;
+ bool has_pcie_dev = 0;
/*
* Walk the devices on this bus, working out what we can
@@ -298,6 +299,8 @@ void pcibios_fixup_bus(struct pci_bus *bus)
list_for_each_entry(dev, &bus->devices, bus_list) {
u16 status;
+ if (!has_pcie_dev)
+ has_pcie_dev = pci_is_pcie(dev);
pci_read_config_word(dev, PCI_STATUS, &status);
/*
@@ -354,9 +357,11 @@ void pcibios_fixup_bus(struct pci_bus *bus)
/*
* Report what we did for this bus
+ * (only if the bus doesn't have even one PCIe device)
*/
- printk(KERN_INFO "PCI: bus%d: Fast back to back transfers %sabled\n",
- bus->number, (features & PCI_COMMAND_FAST_BACK) ? "en" : "dis");
+ if (!has_pcie_dev)
+ pr_info(KERN_INFO "PCI: bus%d: Fast back to back transfers
%sabled\n",
+ bus->number, (features & PCI_COMMAND_FAST_BACK) ? "en"
: "dis");
}
EXPORT_SYMBOL(pcibios_fixup_bus);
--
1.8.1.5
--
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