linux-kernel - Re: [PATCH] ahci: asm1064: asm1166: don't limit reported ports

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Message-ID: <Zfl6vVKtGpC7-z1w@ryzen>
Date: Tue, 19 Mar 2024 12:45:01 +0100
From: Niklas Cassel <cassel@...nel.org>
To: linux-ide@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	dlemoal@...nel.org, hdegoede@...hat.com, cryptearth@...glemail.com
Subject: Re: [PATCH] ahci: asm1064: asm1166: don't limit reported ports

On Wed, Mar 13, 2024 at 10:46:50PM +0100, Conrad Kostecki wrote:
> Previously, patches have been added to limit the reported count of SATA
> ports for asm1064 and asm1166 SATA controllers, as those controllers do
> report more ports than physical having.
> 
> Unfortunately, this causes trouble for users, which are using SATA
> controllers, which provide more ports through SATA PMP
> (Port-MultiPlier) and are now not any more recognized.
> 
> This happens, as asm1064 and 1166 are handling SATA PMP transparently,
> so all non-physical ports needs to be enabled to use that feature.
> 
> This patch reverts both patches for asm1064 and asm1166, so old
> behavior is restored and SATA PMP will work again, so all physical and
> non-physical ports will work again.
> 
> Fixes: 0077a504e1a4 ("ahci: asm1166: correct count of reported ports")
> Fixes: 9815e3961754 ("ahci: asm1064: correct count of reported ports")
> Cc: stable@...r.kernel.org
> Reported-by: Matt <cryptearth@...glemail.com>
> Signed-off-by: Conrad Kostecki <conikost@...too.org>
> ---
>  drivers/ata/ahci.c | 13 -------------
>  1 file changed, 13 deletions(-)
> 
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index 78570684ff68..562302e2e57c 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -669,19 +669,6 @@ MODULE_PARM_DESC(mobile_lpm_policy, "Default LPM policy for mobile chipsets");
>  static void ahci_pci_save_initial_config(struct pci_dev *pdev,
>  					 struct ahci_host_priv *hpriv)
>  {
> -	if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA) {
> -		switch (pdev->device) {
> -		case 0x1166:
> -			dev_info(&pdev->dev, "ASM1166 has only six ports\n");
> -			hpriv->saved_port_map = 0x3f;
> -			break;
> -		case 0x1064:
> -			dev_info(&pdev->dev, "ASM1064 has only four ports\n");
> -			hpriv->saved_port_map = 0xf;
> -			break;
> -		}
> -	}
> -
>  	if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361) {
>  		dev_info(&pdev->dev, "JMB361 has only one port\n");
>  		hpriv->saved_port_map = 1;
> -- 
> 2.44.0
> 

I took the liberty to add additional information in the commit message.

Applied:
https://git.kernel.org/pub/scm/linux/kernel/git/libata/linux.git/commit/?id=6cd8adc3e18960f6e59d797285ed34ef473cc896

..and already sent to Linus:
https://lore.kernel.org/linux-ide/20240319113758.197709-1-cassel@kernel.org/T/#u


Kind regards,
Niklas