diff mbox series

[v2,1/2] driver: ahci: Allow disabling dlpm for all bios version

Message ID 20210322080838.1640805-2-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 
In ahci_broken_lpm(), dmi->driver_data is encoded as a date: if the
date of the current BIOS is older than driver_data, the LPM horkage is
not applied.
Allow dmi->driver_data to be empty in case a problem is not fixed in any
BIOS version.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
---
 Changes in v2:
 Fix cut and paste error in commit message.

 drivers/ata/ahci.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 5f1f049063dd2..9132201f1353e 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1279,6 +1279,9 @@  static bool ahci_broken_lpm(struct pci_dev *pdev)
 	if (!dmi)
 		return false;
 
+	if (!dmi->driver_data)
+		return true;
+
 	dmi_get_date(DMI_BIOS_DATE, &year, &month, &date);
 	snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date);