Re: [PATCH v2] pch_uart: Add MSI support

From: Alexander Stein
Date: Thu Jun 23 2011 - 03:38:34 EST

On Thursday 23 June 2011 09:16:38 Clemens Ladisch wrote:
> Alexander Stein wrote:
> > +++ b/drivers/tty/serial/pch_uart.c
> > @@ -1578,6 +1578,8 @@ static struct eg20t_port *pch_uart_init_port(struct
> > pci_dev *pdev,
> >
> > + pci_enable_msi(pdev);
> Pretty much every driver that tries this eventually ends up with
> a blacklist of devices that don't implement MSI correctly.
> Did you test this with all the models that are supported by this driver?

I don't have all models supported by this driver. So I could only test with
this one:
#lspci -v -s 02:0a.1
02:0a.1 Serial controller: Intel Corporation Device 8811 (prog-if 02 [16550])
Subsystem: Intel Corporation Device 8811
Flags: bus master, fast devsel, latency 0, IRQ 40
I/O ports at 9040 [size=8]
Memory at 9fefb2f0 (32-bit, non-prefetchable) [size=16]
Capabilities: [40] MSI: Mask- 64bit- Count=1/1 Enable+
Capabilities: [50] Power Management version 2
Kernel driver in use: pch_uart

There are 3 more for the other ports.

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