linux-3.4-rc1 PXA2xx PCMCIA possible regression

[Paul Parsons]

On linux-3.3 the PCMCIA/CF on my hx4700 worked OK.

On linux-3.4-rc1 the PCMCIA/CF has stopped working:

pcmcia_socket pcmcia_socket0: pccard: PCMCIA card inserted into slot 0
pcmcia 0.0: pcmcia: registering new device pcmcia0.0 (IRQ: 156)
pata_pcmcia: probe of 0.0 failed with error -12

I've traced the -ENOMEM error back to pcmcia_init_one() in
drivers/ata/pata_pcmcia.c:

   237		/* iomap */
   238		ret = -ENOMEM;
   239		io_addr = devm_ioport_map(&pdev->dev, io_base, 8);
   240		ctl_addr = devm_ioport_map(&pdev->dev, ctl_base, 1);
   241		if (!io_addr || !ctl_addr)
   242			goto failed;

Both calls to devm_ioport_map() return NULL.

The ultimate source of both NULL values appears to be __io() and
thence __typesafe_io(), both defined in arch/arm/include/asm/io.h