On Sat, Jan 10, 2015 at 3:34 AM, Rob Herring <robh@xxxxxxxxxx> wrote:
> Convert the integrator PCI driver to use the generic config access
> functions.
>
> This changes accesses from __raw_readX/__raw_writeX to readX/writeX
> variants.
Just as good.
> The spinlock is removed because it is unnecessary. The config
> read and write functions are already protected with a spinlock and no
> access can occur during the .pre_init function.
>
> Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
> Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
> Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
I trust that you do the right thing I guess...
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> static int v3_read_config(struct pci_bus *bus, unsigned int devfn, int where,
> int size, u32 *val)
> {
> - addr = v3_open_config_window(bus, devfn, where);
> + int ret = pci_generic_config_read(bus, devfn, where, size, val);
> v3_close_config_window();
> + return ret;
> }
>
> static int v3_write_config(struct pci_bus *bus, unsigned int devfn, int where,
> int size, u32 val)
> {
> + int ret = pci_generic_config_write(bus, devfn, where, size, val);
> v3_close_config_window();
> - raw_spin_unlock_irqrestore(&v3_lock, flags);
> + return ret;
> }
>
> static struct pci_ops pci_v3_ops = {
> + .map_bus = v3_open_config_window,
> .read = v3_read_config,
> .write = v3_write_config,
So .map_bus is called before every .read/.write operation I take it.
Wouldn't it be proper to call the v3_close_config_window() from a
matching .unmap_bus() callback for symmetry?
Yours,
Linus Walleij
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