From: Damien Le Moal Date: Tue, 1 Jul 2025 12:53:21 +0000 (+0900) Subject: ata: libata_eh: Add debug messages to ata_eh_link_set_lpm() X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=cb35d3b62274ec4a0b9f9d18ef46fcc902784a92;p=users%2Fjedix%2Flinux-maple.git ata: libata_eh: Add debug messages to ata_eh_link_set_lpm() To facilitate field debugging of link power management related issues, add a debug message to ata_eh_link_set_lpm() to easily track LPM policy changes done from EH context, that is, during device scan and revalidation, error handling, and when a policy change is issued through a host sysfs link_power_management_policy attribute. Signed-off-by: Damien Le Moal Reviewed-by: Niklas Cassel Reviewed-by: Hannes Reinecke Link: https://lore.kernel.org/r/20250701125321.69496-11-dlemoal@kernel.org Signed-off-by: Niklas Cassel --- diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 7f5d13f9ca73f..0f9c30f9bc1ee 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2140,6 +2140,8 @@ static int ata_eh_link_set_lpm(struct ata_link *link, if (WARN_ON_ONCE(policy == ATA_LPM_UNKNOWN)) return 0; + ata_link_dbg(link, "Set LPM policy: %d -> %d\n", old_policy, policy); + /* * DIPM is enabled only for ATA_LPM_MIN_POWER, * ATA_LPM_MIN_POWER_WITH_PARTIAL, and ATA_LPM_MED_POWER_WITH_DIPM, as