scsi: ufs: Remove redundant checks of !hba in suspend/resume callbacks

Runtime and system suspend/resume can only come after hba probe invokes
platform_set_drvdata(pdev, hba), meaning hba cannot be NULL in these PM
callbacks, so remove the checks of !hba.

Link: https://lore.kernel.org/r/1614145010-36079-4-git-send-email-cang@codeaurora.org
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -95,8 +95,6 @@
 		       16, 4, buf, __len, false);                        \
 } while (0)
 
-static bool early_suspend;
-
 int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
 		     const char *prefix)
 {
@@ -8978,11 +8976,6 @@ int ufshcd_system_suspend(struct ufs_hba *hba)
 	int ret = 0;
 	ktime_t start = ktime_get();
 
-	if (!hba) {
-		early_suspend = true;
-		return 0;
-	}
-
 	down(&hba->host_sem);
 
 	if (!hba->is_powered)
@@ -9034,14 +9027,6 @@ int ufshcd_system_resume(struct ufs_hba *hba)
 	int ret = 0;
 	ktime_t start = ktime_get();
 
-	if (!hba)
-		return -EINVAL;
-
-	if (unlikely(early_suspend)) {
-		early_suspend = false;
-		down(&hba->host_sem);
-	}
-
 	if (!hba->is_powered || pm_runtime_suspended(hba->dev))
 		/*
 		 * Let the runtime resume take care of resuming
@@ -9074,9 +9059,6 @@ int ufshcd_runtime_suspend(struct ufs_hba *hba)
 	int ret = 0;
 	ktime_t start = ktime_get();
 
-	if (!hba)
-		return -EINVAL;
-
 	if (!hba->is_powered)
 		goto out;
 	else
@@ -9115,9 +9097,6 @@ int ufshcd_runtime_resume(struct ufs_hba *hba)
 	int ret = 0;
 	ktime_t start = ktime_get();
 
-	if (!hba)
-		return -EINVAL;
-
 	if (!hba->is_powered)
 		goto out;
 	else