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PCI: Show driver, BAR#, and resource on pci_ioremap_bar() failure 

Use dev_warn() to complain about a pci_ioremap_bar() failure so we can
include the driver name, BAR number, and the resource itself.  We could use
dev_WARN() to also get the backtrace as we did previously, but I think
that's more information than we need.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bjorn Helgaas 2015-03-12 12:30:11 -05:00
parent c770cb4cb5
commit 1f7bf3bfb5
1 changed files with 5 additions and 4 deletions
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9
drivers/pci/pci.c
View File

@ -126,15 +126,16 @@ EXPORT_SYMBOL_GPL(pci_bus_max_busnr);
#ifdef CONFIG_HAS_IOMEM
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar)
{
struct resource *res = &pdev->resource[bar];
/*
* Make sure the BAR is actually a memory resource, not an IO resource
*/
if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
WARN_ON(1);
if (!(res->flags & IORESOURCE_MEM)) {
dev_warn(&pdev->dev, "can't ioremap BAR %d: %pR\n", bar, res);
return NULL;
}
return ioremap_nocache(pci_resource_start(pdev, bar),
pci_resource_len(pdev, bar));
return ioremap_nocache(res->start, resource_size(res));
}
EXPORT_SYMBOL_GPL(pci_ioremap_bar);
#endif