ahci: asm1166: correct count of reported ports

[ Upstream commit 0077a504e1a4468669fd2e011108db49133db56e ]

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@gentoo.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 4297a8d69dbf7ef09aa05e3a7adf68714acd6a33..8bfada4843d837977d975e310d9c9aa5b4fec20b 100644 (file)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -654,6 +654,11 @@ 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->force_port_map = 1;