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Message-ID: <1403441084-5643-1-git-send-email-vidyas@nvidia.com> Date: Sun, 22 Jun 2014 18:14:44 +0530 From: Vidya Sagar <vidyas@...dia.com> To: <linux@....linux.org.uk>, <bhelgaas@...gle.com>, <wangyijing@...wei.com>, <thierry.reding@...il.com>, <jason@...edaemon.net>, <will.deacon@....com>, <swarren@...dia.com>, <kthota@...dia.com>, <vidyas@...dia.com> CC: <sagar.tv@...il.com>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org> Subject: [PATCH v4] ARM: fix debug prints relevant to PCI devices 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 <vidyas@...dia.com> --- v4: * initialized 'has_pcie_dev' to 'false' v3: * removed KERN_INFO from pr_info() which was not removed by mistake in previous patch 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 | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c index 17a26c1..749d1a0 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 = false; /* * 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 +357,12 @@ void pcibios_fixup_bus(struct pci_bus *bus) /* * Report what we did for this bus + * (only if the bus doesn't have any PCIe devices) */ - 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("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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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