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authorBjorn Helgaas <bhelgaas@google.com>2017-11-29 20:47:29 +0300
committerBjorn Helgaas <bhelgaas@google.com>2017-12-19 08:07:41 +0300
commit7a09490966bd4e36fd1cee33775b3ed15344f93d (patch)
treeaba478b5ca45452eb14bc410bd11029de65a8a2a /drivers/pci/pci-sysfs.c
parent1291a0d5049dbc06baaaf66a9ff3f53db493b19b (diff)
downloadlinux-7a09490966bd4e36fd1cee33775b3ed15344f93d.tar.xz
PCI: Remove sysfs resource mmap warning
When a process uses sysfs and 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. But in general we don't emit kernel messages when syscalls return failure. The similar procfs mmap path simply fails the mmap with no warning. Remove the sysfs warning. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pci-sysfs.c')
-rw-r--r--drivers/pci/pci-sysfs.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 06c7f0b85cd2..ccc0e28c6678 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1216,14 +1216,9 @@ static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start))
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",
- 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));
+ if (!pci_mmap_fits(pdev, bar, vma, PCI_MMAP_SYSFS))
return -EINVAL;
- }
+
mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
return pci_mmap_resource_range(pdev, bar, vma, mmap_type, write_combine);