linux-kernel - Re: [PATCH 1/3] PCI: rockchip: fix sign issues for current limits

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Date:   Thu, 9 Mar 2017 16:59:15 +0800
From:   Shawn Lin <shawn.lin@...k-chips.com>
To:     Brian Norris <briannorris@...omium.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     shawn.lin@...k-chips.com, linux-kernel@...r.kernel.org,
        Brian Norris <computersforpeace@...il.com>,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        Wenrui Li <wenrui.li@...k-chips.com>,
        linux-pci@...r.kernel.org, linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH 1/3] PCI: rockchip: fix sign issues for current limits

On 2017/3/9 7:37, Brian Norris wrote:
> The regulator framework can return negative error codes via
> regulator_get_current_limit() for regulators that don't provide current
> information. The subsequent check for postive values isn't very useful,
> if the variable is unsigned.
>
> Let's just match the signedness of the return value.
>
> Prevents error messages like this, seen on Samsung Chromebook Plus:
>
> [    1.069372] rockchip-pcie f8000000.pcie: invalid power supply
>

For this patch,

Acked-by: Shawn Lin <shawn.lin@...k-chips.com>

And I think patch 2 is not so urgent so we could just wait for your
non-WIP patch 3?

> Fixes: 4816c4c7b82b ("PCI: rockchip: Provide captured slot power limit and scale")
> Signed-off-by: Brian Norris <briannorris@...omium.org>
> ---
> v4.11 candidate?
>
>  drivers/pci/host/pcie-rockchip.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
> index 26ddd3535272..d785f64ec03b 100644
> --- a/drivers/pci/host/pcie-rockchip.c
> +++ b/drivers/pci/host/pcie-rockchip.c
> @@ -425,7 +425,8 @@ static struct pci_ops rockchip_pcie_ops = {
>
>  static void rockchip_pcie_set_power_limit(struct rockchip_pcie *rockchip)
>  {
> -	u32 status, curr, scale, power;
> +	int curr;
> +	u32 status, scale, power;
>
>  	if (IS_ERR(rockchip->vpcie3v3))
>  		return;
>


-- 
Best Regards
Shawn Lin