Commit cb35d3b6 authored by Damien Le Moal's avatar Damien Le Moal Committed by Niklas Cassel
Browse files

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: default avatarDamien Le Moal <dlemoal@kernel.org>
Reviewed-by: default avatarNiklas Cassel <cassel@kernel.org>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20250701125321.69496-11-dlemoal@kernel.org


Signed-off-by: default avatarNiklas Cassel <cassel@kernel.org>
parent 3b50dd4c

drivers/ata/libata-eh.c

+2 −0
Original line number Diff line number Diff line
@@ -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