linux-kernel - Re: [PATCH] pci: Fix e100 interrupt quirk

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Date:	Wed, 19 Sep 2007 12:43:42 +0200
From:	Jarek Poplawski <jarkao2@...pl>
To:	Valentine Barshak <vbarshak@...mvista.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pci: Fix e100 interrupt quirk

On 18-09-2007 13:17, Valentine Barshak wrote:
> PCI memory space may have a 64-bit offset on some architectures
> (for example, PowerPC 440) and the actual PCI memory address
> has to fixed up (an offset to PCI mem space shuld be added)
> before remapping. So, pci_iomap should be used instead of
> reading and remapping PCI BAR directly. This has been tested
> on Sequoia PowerPC 440EPx board.
> 
> Signed-off-by: Valentine Barshak <vbarshak@...mvista.com>
> ---
> 
> --- linux-2.6.orig/drivers/pci/quirks.c	2007-09-04 21:15:43.000000000 +0400
> +++ linux-2.6.bld/drivers/pci/quirks.c	2007-09-05 20:46:14.000000000 +0400
> @@ -1444,9 +1444,9 @@
>  static void __devinit quirk_e100_interrupt(struct pci_dev *dev)
>  {
>  	u16 command;
> -	u32 bar;
>  	u8 __iomem *csr;
>  	u8 cmd_hi;
> +	int rc;
>  
>  	switch (dev->device) {
>  	/* PCI IDs taken from drivers/net/e100.c */
> @@ -1476,16 +1476,17 @@
>  	 * re-enable them when it's ready.
>  	 */
>  	pci_read_config_word(dev, PCI_COMMAND, &command);
> -	pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar);
>  
> -	if (!(command & PCI_COMMAND_MEMORY) || !bar)
> +	rc = pci_request_region(dev, 0, "e100_quirk");
> +
> +	if (!(command & PCI_COMMAND_MEMORY) || (rc < 0))
>  		return;

I didn't look at this too much, but isn't something like:
		if (rc >=  0)
			goto e100_quirk_exit;
needed before this return?

Regards,
Jarek P.
-
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