diff options
| -rw-r--r-- | drivers/ata/libata-eh.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index f39756a26751..89b7b2139a16 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -3443,6 +3443,13 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, return 0; /* + * This function currently assumes that it will never be supplied policy + * ATA_LPM_UNKNOWN. + */ + if (WARN_ON_ONCE(policy == ATA_LPM_UNKNOWN)) + return 0; + + /* * DIPM is enabled only for ATA_LPM_MIN_POWER, * ATA_LPM_MIN_POWER_WITH_PARTIAL, and ATA_LPM_MED_POWER_WITH_DIPM, as * some devices misbehave when the host NACKs transition to SLUMBER. |