ata: libata-eh: Rename hipm and dipm variables

Rename the hipm and dipm variables to have a clearer name.
Also fold in the usage of no_dipm, as that is required in order to give
the dipm variable a more descriptive name.

No functional change.

Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

Author: floatious

drivers/ata/libata-eh.c

@@ -3455,22 +3455,23 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 	 * some devices misbehave when the host NACKs transition to SLUMBER.
 	 */
 	ata_for_each_dev(dev, link, ENABLED) {
-		bool hipm = ata_id_has_hipm(dev->id);
-		bool dipm = ata_id_has_dipm(dev->id) && !no_dipm;
+		bool dev_has_hipm = ata_id_has_hipm(dev->id);
+		bool dev_has_dipm = ata_id_has_dipm(dev->id);
 
 		/* find the first enabled and LPM enabled devices */
 		if (!link_dev)
 			link_dev = dev;
 
-		if (!lpm_dev && (hipm || dipm))
+		if (!lpm_dev && (dev_has_hipm || (dev_has_dipm && !no_dipm)))
 			lpm_dev = dev;
 
 		hints &= ~ATA_LPM_EMPTY;
-		if (!hipm)
+		if (!dev_has_hipm)
 			hints &= ~ATA_LPM_HIPM;
 
 		/* disable DIPM before changing link config */
-		if (policy < ATA_LPM_MED_POWER_WITH_DIPM && dipm) {
+		if (policy < ATA_LPM_MED_POWER_WITH_DIPM &&
+		    (dev_has_dipm && !no_dipm)) {
 			err_mask = ata_dev_set_feature(dev,
 					SETFEATURES_SATA_DISABLE, SATA_DIPM);
 			if (err_mask && err_mask != AC_ERR_DEV) {
@@ -3517,8 +3518,10 @@ static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 	 * ATA_LPM_MED_POWER_WITH_DIPM.
 	 */
 	ata_for_each_dev(dev, link, ENABLED) {
+		bool dev_has_dipm = ata_id_has_dipm(dev->id);
+
 		if (policy >= ATA_LPM_MED_POWER_WITH_DIPM && !no_dipm &&
-		    ata_id_has_dipm(dev->id)) {
+		    dev_has_dipm) {
 			err_mask = ata_dev_set_feature(dev,
 					SETFEATURES_SATA_ENABLE, SATA_DIPM);
 			if (err_mask && err_mask != AC_ERR_DEV) {