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[v2,2/2] driver: ahci: Disable DLPM on Fizz chromebox

Message ID 20210322080838.1640805-3-gwendal@chromium.org
State New
Headers show
Series Disable SATA DPLM on Fizz chromebox | expand

Commit Message

Gwendal Grignou March 22, 2021, 8:08 a.m. UTC 
On Chromebox Fizz platform, (HP Chromebox G2, ASUS Chromebox 3, ...),
hard CPU freeze were observed when the SSD DLPM is engaged at
'min_power'.

Ensure we can not change the |link_power_management_policy| of the host
controller connected to the root SSD. (Operation not supported).

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
---
 No changes in v2.

 drivers/ata/ahci.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 9132201f1353e..4b932bb4ed570 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1270,6 +1270,12 @@  static bool ahci_broken_lpm(struct pci_dev *pdev)
 			 */
 			.driver_data = "20180310", /* 2.35 */
 		},
+		{
+			.matches = {
+				DMI_MATCH(DMI_BOARD_VENDOR, "Google"),
+				DMI_MATCH(DMI_BOARD_NAME, "Fizz"),
+			},
+		},
 		{ }	/* terminate list */
 	};
 	const struct dmi_system_id *dmi = dmi_first_match(sysids);