[PATCH v1 2/2] serial: 8250_pci: Replace custom code with pci_match_id()

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

From: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>

serial_pci_is_blacklisted() is very similar to pci_match_id() implementation.
Replace it with the latter.

Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/tty/serial/8250/8250_pci.c | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 48bd694a5fa1..d0957b2f1c93 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -3375,6 +3375,9 @@ static const struct pci_device_id blacklist[] = {
 	/* Exar devices */
 	{ PCI_VDEVICE(EXAR, PCI_ANY_ID), },
 	{ PCI_VDEVICE(COMMTECH, PCI_ANY_ID), },
+
+	/* End of the black list */
+	{ }
 };
 
 static int serial_pci_is_class_communication(struct pci_dev *dev)
@@ -3392,25 +3395,6 @@ static int serial_pci_is_class_communication(struct pci_dev *dev)
 	return 0;
 }
 
-static int serial_pci_is_blacklisted(struct pci_dev *dev)
-{
-	const struct pci_device_id *bldev;
-
-	/*
-	 * Do not access blacklisted devices that are known not to
-	 * feature serial ports or are handled by other modules.
-	 */
-	for (bldev = blacklist;
-	     bldev < blacklist + ARRAY_SIZE(blacklist);
-	     bldev++) {
-		if (dev->vendor == bldev->vendor &&
-		    dev->device == bldev->device)
-			return -ENODEV;
-	}
-
-	return 0;
-}
-
 /*
  * Given a complete unknown PCI device, try to use some heuristics to
  * guess what the configuration might be, based on the pitiful PCI
@@ -3634,6 +3618,7 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
 	struct pci_serial_quirk *quirk;
 	struct serial_private *priv;
 	const struct pciserial_board *board;
+	const struct pci_device_id *exclude;
 	struct pciserial_board tmp;
 	int rc;
 
@@ -3652,9 +3637,9 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
 
 	board = &pci_boards[ent->driver_data];
 
-	rc = serial_pci_is_blacklisted(dev);
-	if (rc)
-		return rc;
+	exclude = pci_match_id(blacklist, dev);
+	if (exclude)
+		return -ENODEV;
 
 	rc = pcim_enable_device(dev);
 	pci_save_state(dev);
-- 
2.20.1