From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Wed, 8 Feb 2017 16:09:09 +0000 (+0100)
Subject: serial: exar: Enable MSI support
X-Git-Tag: v4.11-rc1~115^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=172c33cb61da0df5ccbdf1a8e736c8837d165a00;p=platform%2Fkernel%2Flinux-exynos.git

serial: exar: Enable MSI support

Use pci_alloc_irq_vectors to enable MSI when available. At least the
XR17V352 supports this.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index f612da3..b89c4ff 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -283,10 +283,16 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
 
 	priv->board = board;
 
+	pci_set_master(pcidev);
+
+	rc = pci_alloc_irq_vectors(pcidev, 1, 1, PCI_IRQ_ALL_TYPES);
+	if (rc < 0)
+		return rc;
+
 	memset(&uart, 0, sizeof(uart));
 	uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ
 			  | UPF_EXAR_EFR;
-	uart.port.irq = pcidev->irq;
+	uart.port.irq = pci_irq_vector(pcidev, 0);
 	uart.port.dev = &pcidev->dev;
 
 	for (i = 0; i < nr_ports && i < maxnr; i++) {