hwspinlock: omap: Use devm_kzalloc() to allocate memory

Use devm_kzalloc() to allocate memory, which can simplify the error
handling.

Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/c066ad704c1a5fd52c3002cac80ddd59b3901b01.1578453062.git.baolin.wang7@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/hwspinlock/omap_hwspinlock.c

@@ -119,7 +119,8 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
 
 	num_locks = i * 32; /* actual number of locks in this device */
 
-	bank = kzalloc(struct_size(bank, lock, num_locks), GFP_KERNEL);
+	bank = devm_kzalloc(&pdev->dev, struct_size(bank, lock, num_locks),
+			    GFP_KERNEL);
 	if (!bank) {
 		ret = -ENOMEM;
 		goto runtime_err;
@@ -133,15 +134,13 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
 	ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops,
 						base_id, num_locks);
 	if (ret)
-		goto reg_fail;
+		goto runtime_err;
 
 	dev_dbg(&pdev->dev, "Registered %d locks with HwSpinlock core\n",
 		num_locks);
 
 	return 0;
 
-reg_fail:
-	kfree(bank);
 runtime_err:
 	pm_runtime_disable(&pdev->dev);
 	return ret;
@@ -159,7 +158,6 @@ static int omap_hwspinlock_remove(struct platform_device *pdev)
 	}
 
 	pm_runtime_disable(&pdev->dev);
-	kfree(bank);
 
 	return 0;
 }