When CONFIG_PCI_IOV is enabled, the kernel will call sriov_init().
This function tries to allocate virtual resources even if the
virtual function of a PCI devive is not enabled by the BIOS.
This sometimes causes following warning messages during boot up:
pci 0000:02:00.0: BAR 9: can't allocate mem resource [0x000000-0x3fffff]
pci 0000:02:00.0: BAR 7: can't allocate mem resource [0x000000-0x03ffff]
Tested on three Mitac motherboards.
Signed-off-by: Jiang Wang <jwang@xxxxxxxxxxxx>
---
drivers/pci/iov.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 6554e1a..0ca8cb2 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -441,7 +441,8 @@ static int sriov_init(struct pci_dev *dev, int pos)
if (ctrl & PCI_SRIOV_CTRL_VFE) {
pci_write_config_word(dev, pos + PCI_SRIOV_CTRL, 0);
ssleep(1);
- }
+ } else
+ return 0;
pci_read_config_word(dev, pos + PCI_SRIOV_TOTAL_VF, &total);
if (!total)
--
1.7.1
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