ide: fix IDE ACPI for slave device-only configurations

ACPI _GTM / _PS0 / _STM were not called if only slave device was present.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 10 insertions, 11 deletions

diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 9dcf5aed92c..64997873b6d 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -365,15 +365,15 @@ __IDE_DEVSET(pio_mode, 0, NULL, set_pio_mode);
 
 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 {
-        ide_drive_t *drive = dev->driver_data;
+        ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive);
         ide_hwif_t *hwif = HWIF(drive);
         struct request *rq;
         struct request_pm_state rqpm;
         ide_task_t args;
         int ret;
 
-        /* Call ACPI _GTM only once */
-        if (!(drive->dn % 2))
+        /* call ACPI _GTM only once */
+        if ((drive->dn & 1) == 0 || pair == NULL)
                 ide_acpi_get_timing(hwif);
 
         memset(&rqpm, 0, sizeof(rqpm));
@@ -389,26 +389,25 @@ static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 
         ret = blk_execute_rq(drive->queue, NULL, rq, 0);
         blk_put_request(rq);
-        /* only call ACPI _PS3 after both drivers are suspended */
-        if (!ret && (((drive->dn % 2) && hwif->drives[0].present
-                 && hwif->drives[1].present)
-                 || !hwif->drives[0].present
-                 || !hwif->drives[1].present))
+
+        /* call ACPI _PS3 only after both devices are suspended */
+        if (ret == 0 && ((drive->dn & 1) || pair == NULL))
                 ide_acpi_set_state(hwif, 0);
+
         return ret;
 }
 
 static int generic_ide_resume(struct device *dev)
 {
-        ide_drive_t *drive = dev->driver_data;
+        ide_drive_t *drive = dev->driver_data, *pair = ide_get_pair_dev(drive);
         ide_hwif_t *hwif = HWIF(drive);
         struct request *rq;
         struct request_pm_state rqpm;
         ide_task_t args;
         int err;
 
-        /* Call ACPI _STM only once */
-        if (!(drive->dn % 2)) {
+        /* call ACPI _PS0 / _STM only once */
+        if ((drive->dn & 1) == 0 || pair == NULL) {
                 ide_acpi_set_state(hwif, 1);
                 ide_acpi_push_timing(hwif);
         }