linux-kernel - Re: [PATCH 9/9] radeon: use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID

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Message-ID: <51CAE967.7080704@ti.com>
Date:	Wed, 26 Jun 2013 16:15:19 +0300
From:	Tomi Valkeinen <tomi.valkeinen@...com>
To:	Yijing Wang <wangyijing@...wei.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	<linux-kernel@...r.kernel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	<linux-fbdev@...r.kernel.org>
Subject: Re: [PATCH 9/9] radeon: use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID_PM)

On 26/06/13 04:13, Yijing Wang wrote:
> Pci core has been saved pm cap register offset by pdev->pm_cap in pci_pm_init()
> in init path. So we can use pdev->pm_cap instead of using
> pci_find_capability(pdev, PCI_CAP_ID_PM) for better performance and simplified code.
> 
> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Cc: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
> Cc: Tomi Valkeinen <tomi.valkeinen@...com>
> Cc: linux-fbdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> ---
>  drivers/video/aty/radeon_pm.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/video/aty/radeon_pm.c b/drivers/video/aty/radeon_pm.c
> index 92bda58..f7091ec 100644
> --- a/drivers/video/aty/radeon_pm.c
> +++ b/drivers/video/aty/radeon_pm.c
> @@ -2805,7 +2805,7 @@ static void radeonfb_early_resume(void *data)
>  void radeonfb_pm_init(struct radeonfb_info *rinfo, int dynclk, int ignore_devlist, int force_sleep)
>  {
>  	/* Find PM registers in config space if any*/
> -	rinfo->pm_reg = pci_find_capability(rinfo->pdev, PCI_CAP_ID_PM);
> +	rinfo->pm_reg = rinfo->pdev->pm_cap;
>  
>  	/* Enable/Disable dynamic clocks: TODO add sysfs access */
>  	if (rinfo->family == CHIP_FAMILY_RS480)

I couldn't find the rest of this series, and I'm not familiar with PCI.
So: is this patch and "aty128fb: use pdev->pm_cap instead of
pci_find_capability(..,PCI_CAP_ID_PM)" safe to apply for fbdev-3.11
without anything else? I.e. has the PCI core changes been merged in 3.10
or ealier?

 Tomi



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