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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>
hifive-unleashed-5.1
Jan Kiszka 2017-02-08 17:09:09 +01:00 committed by Greg Kroah-Hartman
parent 7e12357ed6
commit 172c33cb61
1 changed files with 7 additions and 1 deletions
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8
drivers/tty/serial/8250/8250_exar.c
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@ -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++) {