[PATCH v4 9/9] ata: ahci: Add debug print for external port

Niklas Cassel
2024-07-03T18:45:14Z

Add a debug print that tells us if LPM is not getting enabled because the
port is external.

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
drivers/ata/ahci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index fc6fd583faf8..a05c17249448 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1732,8 +1732,10 @@ static void ahci_update_initial_lpm_policy(struct ata_port *ap)
* 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)
+ if (ap->pflags & ATA_PFLAG_EXTERNAL) {
+ ata_port_dbg(ap, "external port, not enabling LPM\n");
return;
+ }

/* If no LPM states are supported by the HBA, do not bother with LPM */
if ((ap->host->flags & ATA_HOST_NO_PART) &&
--
2.45.2