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-rw-r--r--drivers/ata/libata-core.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index fa2fc1953..f14e56a5c 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2005,6 +2005,10 @@ void ata_dev_power_set_active(struct ata_device *dev)
struct ata_taskfile tf;
unsigned int err_mask;
+ /* If the device is already sleeping, do nothing. */
+ if (dev->flags & ATA_DFLAG_SLEEPING)
+ return;
+
/*
* Issue READ VERIFY SECTORS command for 1 sector at lba=0 only
* if supported by the device.