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-rw-r--r--drivers/block/nvme-scsi.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/block/nvme-scsi.c b/drivers/block/nvme-scsi.c
index 24308ae8abf5..a4cd6d691c63 100644
--- a/drivers/block/nvme-scsi.c
+++ b/drivers/block/nvme-scsi.c
@@ -1476,7 +1476,7 @@ static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
goto out_dma;
}
id_ctrl = mem;
- lowest_pow_st = id_ctrl->npss - 1;
+ lowest_pow_st = max(POWER_STATE_0, (int)(id_ctrl->npss - 1));
switch (pc) {
case NVME_POWER_STATE_START_VALID:
@@ -1493,20 +1493,19 @@ static int nvme_trans_power_state(struct nvme_ns *ns, struct sg_io_hdr *hdr,
break;
case NVME_POWER_STATE_IDLE:
/* Action unspecified if POWER CONDITION MODIFIER != [0,1,2] */
- /* min of desired state and (lps-1) because lps is STOP */
if (pcmod == 0x0)
- ps_desired = min(POWER_STATE_1, (lowest_pow_st - 1));
+ ps_desired = POWER_STATE_1;
else if (pcmod == 0x1)
- ps_desired = min(POWER_STATE_2, (lowest_pow_st - 1));
+ ps_desired = POWER_STATE_2;
else if (pcmod == 0x2)
- ps_desired = min(POWER_STATE_3, (lowest_pow_st - 1));
+ ps_desired = POWER_STATE_3;
break;
case NVME_POWER_STATE_STANDBY:
/* Action unspecified if POWER CONDITION MODIFIER != [0,1] */
if (pcmod == 0x0)
- ps_desired = max(0, (lowest_pow_st - 2));
+ ps_desired = max(POWER_STATE_0, (lowest_pow_st - 2));
else if (pcmod == 0x1)
- ps_desired = max(0, (lowest_pow_st - 1));
+ ps_desired = max(POWER_STATE_0, (lowest_pow_st - 1));
break;
case NVME_POWER_STATE_LU_CONTROL:
default: