linux-kernel - [PATCH] ahci: asm1064: correct count of reported ports

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Message-ID: <vbpzr7uqpfemb3qa6xy2fxioct44l5vugg2wkywyolfpzqcmau@jgrrhmk2scaj>
Date: Wed, 7 Feb 2024 12:58:56 +0300
From: "Andrey Jr. Melnikov" <temnota.am@...il.com>
To: linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: dlemoal@...nel.org, hdegoede@...hat.com
Subject: [PATCH] ahci: asm1064: correct count of reported ports

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@...il.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) {
+			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) {