lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Tue, 07 Oct 2014 08:44:05 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Vidya Sagar <vidyas@...dia.com>, thierry.reding@...il.com,
	bhelgaas@...gle.com
CC:	kthota@...dia.com, linux-tegra@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] PCI: tegra: Enable root port specific features

On 10/07/2014 03:27 AM, Vidya Sagar wrote:
> Enables root port to advertise its ASPM-L1 capability
>  resulting in possible link entry to L1 when an ASPM-L1 capable
>  device is connected
> Enables per-controller & per-TMS clock clamping by default
> Enabling above features result in more power saving
> 
> It also avoids PM message truncation by waiting for DLLP to finish
> before entering into L1 or L2
> 
> Also, it adds helper functions to access root port registers

> diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c

> @@ -1870,8 +1920,10 @@ static int tegra_pcie_enable(struct tegra_pcie *pcie)
>  
>  		tegra_pcie_port_enable(port);
>  
> -		if (tegra_pcie_port_check_link(port))
> +		if (tegra_pcie_port_check_link(port)) {
> +			tegra_pcie_enable_rp_features(port);
>  			continue;
> +		}
>  
>  		dev_info(pcie->dev, "link %u down, ignoring\n", port->index);

Wouldn't it be better to have the error case inside the if block; most
error-handling is that way. For example:

if (!tegra_pcie_port_check_link(port)) {
	dev_info(pcie->dev, "link %u down, ignoring\n", port->index);
	tegra_pcie_port_disable(port);
	tegra_pcie_port_free(port);
	continue;
}

tegra_pcie_enable_rp_features(port);
... any other "good case" code (of which there admittedly is none at
present)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists