From: Mario Limonciello <mario.limonciello@xxxxxxx>
Historically this was set to "keep_firmware_settings" to prevent problems
with power management on very old drives. However it's been observed that
almost all modern Linux distributions either set the policy to
"med_power_with_dipm" in the kernel configuration or update it to this via
userspace policy changes. Update the policy default in the kernel to
"med_power_with_dipm" to match that behavior as well.
Changing the default was previously not a good idea, because LPM disables
detection of hot plug removals, however, since commit ae1f3db006b7 ("ata:
ahci: do not enable LPM on external ports"), a port marked as external
will always be initialized to "keep_firmware_settings", regardless of the
SATA_MOBILE_LPM_POLICY Kconfig value. Therefore, changing the default is
now considered safe (external ports included).
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
[cassel: rebased and reworded commit message]
Signed-off-by: Niklas Cassel <cassel@xxxxxxxxxx>
---
drivers/ata/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index b595494ab9b4..e00536b49552 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -118,7 +118,7 @@ config SATA_AHCI
config SATA_MOBILE_LPM_POLICY
int "Default SATA Link Power Management policy"
range 0 4
- default 0
+ default 3
depends on SATA_AHCI
help
Select the Default SATA Link Power Management (LPM) policy to use
--
2.44.0
