linux-kernel - Re: [PATCH] ahci: asm1166: correct count of reported ports

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Message-ID: <c0d59d12-edf3-44eb-adfd-29c3dc1bde23@redhat.com>
Date: Tue, 23 Jan 2024 20:04:53 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: dlemoal@...nel.org
Subject: Re: [PATCH] ahci: asm1166: correct count of reported ports

Hi Conrad,

On 1/23/24 19:30, Conrad Kostecki wrote:
> The ASM1166 SATA host controller always reports wrongly,
> that it has 32 ports. But in reality, it only has six ports.
> 
> This seems to be a hardware issue, as all tested ASM1166
> SATA host controllers reports such high count of ports.
> 
> Example output: ahci 0000:09:00.0: AHCI 0001.0301
> 32 slots 32 ports 6 Gbps 0xffffff3f impl SATA mode.
> 
> By adjusting the port_map, the count is limited to six ports.
> 
> New output: ahci 0000:09:00.0: AHCI 0001.0301
> 32 slots 32 ports 6 Gbps 0x3f impl SATA mode.
> 
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=211873
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218346
> Signed-off-by: Conrad Kostecki <conikost@...too.org>

Looks like this is a double submission of the earlier
version (which did make it to the list).

Anyways this version looks good to me too:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> ---
>  drivers/ata/ahci.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index 3a5f3255f51b..762c5d8b7c1a 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -663,6 +663,11 @@ 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 && pdev->device == 0x1166) {
> +		dev_info(&pdev->dev, "ASM1166 has only six ports\n");
> +		hpriv->saved_port_map = 0x3f;
> +	}
> +
>  	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;