Re: [PATCH v2 1/3] PCI: Make specifying PCI devices in kernel parameters reusable

[Andy Shevchenko]

On Fri, Jun 1, 2018 at 2:50 AM, Logan Gunthorpe <logang@xxxxxxxxxxxx> wrote:
> Separate out the code to match a PCI device with a string (typically
> originating from a kernel parameter) from the
> pci_specified_resource_alignment() function into its own helper
> function.
>
> While we are at it, this change fixes the kernel style of the function
> (fixing a number of long lines and extra parentheses).
>
> Additionally, make the analogous change to the kernel parameter
> documentation: Separating the description of how to specify a PCI device
> into it's own section at the head of the pci= parameter.
>
> Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
> Reviewed-by: Stephen Bates <sbates@xxxxxxxxxxxx>
> Acked-by: Christian KÃnig <christian.koenig@xxxxxxx>

Sorry for maybe being late here.

> -       pci=option[,option...]  [PCI] various PCI subsystem options:
> +       pci=option[,option...]  [PCI] various PCI subsystem options.
> +
> +                               Some options herein operate on a specific device
> +                               or a set of devices (<pci_dev>). These are
> +                               specified in one of two formats:

I would rather to add

 <pci_dev>

here in the same way as done for options.
It would be easy for people to find a referenced paragraph.

> +
> +                               [<domain>:]<bus>:<slot>.<func>
> +                               pci:<vendor>:<device>[:<subvendor>:<subdevice>]
> +
> +                               Note: the first format specifies a PCI
> +                               bus/slot/function address which may change
> +                               if new hardware is inserted, if motherboard
> +                               firmware changes, or due to changes caused
> +                               by other kernel parameters. The second format
> +                               selects devices using IDs from the
> +                               configuration space which may match multiple
> +                               devices in the system.

> +static int pci_dev_str_match(struct pci_dev *dev, const char *p,
> +                            const char **endptr)

This change I hope has no functional alteration, so, can be split to a
separate patch.

-- 
With Best Regards,
Andy Shevchenko