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Subject: Re: [PATCH] ahci: asm1064: correct count of reported ports
To: "Andrey Jr. Melnikov" <temnota.am@gmail.com>, linux-ide@vger.kernel.org,
 linux-kernel@vger.kernel.org
Cc: dlemoal@kernel.org, hdegoede@redhat.com
References: <vbpzr7uqpfemb3qa6xy2fxioct44l5vugg2wkywyolfpzqcmau@jgrrhmk2scaj>
From: Sergei Shtylyov <sergei.shtylyov@gmail.com>
Message-ID: <7559d940-f191-4fe0-e147-17ffa6c1dfc4@gmail.com>
Date: Wed, 7 Feb 2024 14:28:32 +0300
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On 2/7/24 12:58 PM, Andrey Jr. Melnikov wrote:

> The ASM1064 SATA host controller always reports wrongly,
> that it has 24 ports. But in reality, it only has four ports.
> 
> before:
> ahci 0000:04:00.0: SSS flag set, parallel bus scan disabled
> ahci 0000:04:00.0: AHCI 0001.0301 32 slots 24 ports 6 Gbps 0xffff0f impl SATA mode
> ahci 0000:04:00.0: flags: 64bit ncq sntf stag pm led only pio sxs deso sadm sds apst 
> 
> after:
> ahci 0000:04:00.0: ASM1064 has only four ports
> ahci 0000:04:00.0: forcing port_map 0xffff0f -> 0xf
> ahci 0000:04:00.0: SSS flag set, parallel bus scan disabled
> ahci 0000:04:00.0: AHCI 0001.0301 32 slots 24 ports 6 Gbps 0xf impl SATA mode
> ahci 0000:04:00.0: flags: 64bit ncq sntf stag pm led only pio sxs deso sadm sds apst 
> 
> 
> Signed-off-by: Andrey Jr. Melnikov <temnota.am@gmail.com>
> 
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index da2e74fce2d9..ec30d8330d16 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -671,9 +671,14 @@ 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_ASMEDIA) {
> +		if (pdev->device == 0x1166) {

   Maybe *switch* instead?

> +			dev_info(&pdev->dev, "ASM1166 has only six ports\n");
> +			hpriv->saved_port_map = 0x3f;
> +		} else if (pdev->device == 0x1064) {
> +			dev_info(&pdev->dev, "ASM1064 has only four ports\n");
> +			hpriv->saved_port_map = 0xf;
> +		}
>  	}
>  
>  	if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361) {

MBR, Sergey