Found debug print out about class is shifted.
| pci 0000:f8:15.2: [8086:2b56] type 0 class 0x000600
code is trying to print class with 6 digits, but use shifted class with 4 digits
valid value as variable.
Change to original dev->class directly.
also remove not needed calculating of local variable class, because it will be
updated after pci_fixup_device(pci_fixup_early...)
Also unify type print out when class and header is not matched.
Signed-off-by: Yinghai Lu <[email protected]>
---
drivers/pci/probe.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
Index: linux-2.6/drivers/pci/probe.c
===================================================================
--- linux-2.6.orig/drivers/pci/probe.c
+++ linux-2.6/drivers/pci/probe.c
@@ -1125,12 +1125,10 @@ int pci_setup_device(struct pci_dev *dev
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
dev->revision = class & 0xff;
- class >>= 8; /* upper 3 bytes */
- dev->class = class;
- class >>= 8;
+ dev->class = class >> 8; /* upper 3 bytes */
- dev_printk(KERN_DEBUG, &dev->dev, "[%04x:%04x] type %d class %#08x\n",
- dev->vendor, dev->device, dev->hdr_type, class);
+ dev_printk(KERN_DEBUG, &dev->dev, "[%04x:%04x] type %02x class %#08x\n",
+ dev->vendor, dev->device, dev->hdr_type, dev->class);
/* need to have dev->class ready */
dev->cfg_size = pci_cfg_space_size(dev);
@@ -1212,8 +1210,8 @@ int pci_setup_device(struct pci_dev *dev
return -EIO;
bad:
- dev_err(&dev->dev, "ignoring class %02x (doesn't match header "
- "type %02x)\n", class, dev->hdr_type);
+ dev_err(&dev->dev, "ignoring class %#08x (doesn't match header "
+ "type %02x)\n", dev->class, dev->hdr_type);
dev->class = PCI_CLASS_NOT_DEFINED;
}
On Sun, 19 Feb 2012 14:50:12 -0800
Yinghai Lu <[email protected]> wrote:
> Found debug print out about class is shifted.
>
> | pci 0000:f8:15.2: [8086:2b56] type 0 class 0x000600
>
> code is trying to print class with 6 digits, but use shifted class with 4 digits
> valid value as variable.
>
> Change to original dev->class directly.
>
> also remove not needed calculating of local variable class, because it will be
> updated after pci_fixup_device(pci_fixup_early...)
>
> Also unify type print out when class and header is not matched.
>
> Signed-off-by: Yinghai Lu <[email protected]>
Applied to linux-next, thanks.
--
Jesse Barnes, Intel Open Source Technology Center