[PATCH 4.9 07/56] mISDN: hfcpci: Test both vendor & device ID for Digium HFC4S

From: Greg Kroah-Hartman
Date: Mon Apr 01 2019 - 13:27:58 EST

4.9-stable review patch. If anyone has any objections, please let me know.


From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>

[ Upstream commit fae846e2b7124d4b076ef17791c73addf3b26350 ]

The device ID alone does not uniquely identify a device. Test both the
vendor and device ID to make sure we don't mistakenly think some other
vendor's 0xB410 device is a Digium HFC4S. Also, instead of the bare hex
ID, use the same constant (PCI_DEVICE_ID_DIGIUM_HFC4S) used in the device
ID table.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/isdn/hardware/mISDN/hfcmulti.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -4370,7 +4370,8 @@ setup_pci(struct hfc_multi *hc, struct p
if (m->clock2)
test_and_set_bit(HFC_CHIP_CLOCK2, &hc->chip);

- if (ent->device == 0xB410) {
+ if (ent->vendor == PCI_VENDOR_ID_DIGIUM &&
+ ent->device == PCI_DEVICE_ID_DIGIUM_HFC4S) {
test_and_set_bit(HFC_CHIP_B410P, &hc->chip);
test_and_set_bit(HFC_CHIP_PCM_MASTER, &hc->chip);
test_and_clear_bit(HFC_CHIP_PCM_SLAVE, &hc->chip);