[PATCH] PCI: Tone down resource mmap warning

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelg...@google.com>

When a process tries to mmap more space than is available in a PCI BAR, we
emit a warning and a backtrace.  The mmap fails anyway, so the backtrace is
mainly for debugging.  It seems like overkill now, so reduce this to a
dev_info() and remove the backtrace.

This was added by b5ff7df3df9e ("Check mapped ranges on sysfs resource
files").

Reported-by: Fengguang Wu <fengguang...@intel.com>
Signed-off-by: Bjorn Helgaas <bhelg...@google.com>
---
 drivers/pci/pci-sysfs.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 06c7f0b85cd2..97f071674605 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1217,11 +1217,9 @@ static int pci_mmap_resource(struct kobject *kobj, 
struct bin_attribute *attr,
                return -EINVAL;
 
        if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS)) {
-               WARN(1, "process \"%s\" tried to map 0x%08lx bytes at page 
0x%08lx on %s BAR %d (start 0x%16Lx, size 0x%16Lx)\n",
+               dev_info(&pdev->dev, "process \"%s\" tried to map 0x%lx bytes 
at page 0x%lx of BAR %d %pR\n",
                        current->comm, vma->vm_end-vma->vm_start, vma->vm_pgoff,
-                       pci_name(pdev), bar,
-                       (u64)pci_resource_start(pdev, bar),
-                       (u64)pci_resource_len(pdev, bar));
+                       bar, res);
                return -EINVAL;
        }
        mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;