diff options
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/ahci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 346a0f9ef246..9d052ff2b86c 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1665,6 +1665,15 @@ static void ahci_update_initial_lpm_policy(struct ata_port *ap) if (!(hpriv->flags & AHCI_HFLAG_USE_LPM_POLICY)) return; + /* + * AHCI contains a known incompatibility between LPM and hot-plug + * removal events, see 7.3.1 Hot Plug Removal Detection and Power + * Management Interaction in AHCI 1.3.1. Therefore, do not enable + * LPM if the port advertises itself as an external port. + */ + if (ap->pflags & ATA_PFLAG_EXTERNAL) + return; + /* user modified policy via module param */ if (mobile_lpm_policy != -1) { policy = mobile_lpm_policy; |