From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 23 Jan 2023 19:17:41 +0000 (+0200)
Subject: serial: liteuart: Don't mix devm_*() with non-devm_*() calls
X-Git-Tag: v6.6.7~3437^2~44
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=297cb3f0b94bfedd781426814f1798a5c5658050;p=platform%2Fkernel%2Flinux-starfive.git

serial: liteuart: Don't mix devm_*() with non-devm_*() calls

In the probe we need to call all devm_*() first followed by
non-devm_*() calls. This is due to reversed clean up that
may happen in a wrong order otherwise. The driver currently
allocates xarray before calling
devm_platform_get_and_ioremap_resource(). While it's not an
issue in this certain case, it's still better to be pedantic.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gabriel Somlo <somlo@cmu.edu>
Link: https://lore.kernel.org/r/20230123191741.79751-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index 192ad68..5628923 100644
--- a/drivers/tty/serial/liteuart.c
+++ b/drivers/tty/serial/liteuart.c
@@ -286,37 +286,35 @@ static int liteuart_probe(struct platform_device *pdev)
 	struct xa_limit limit;
 	int dev_id, ret;
 
-	/* look for aliases; auto-enumerate for free index if not found */
-	dev_id = of_alias_get_id(pdev->dev.of_node, "serial");
-	if (dev_id < 0)
-		limit = XA_LIMIT(0, CONFIG_SERIAL_LITEUART_MAX_PORTS);
-	else
-		limit = XA_LIMIT(dev_id, dev_id);
-
 	uart = devm_kzalloc(&pdev->dev, sizeof(struct liteuart_port), GFP_KERNEL);
 	if (!uart)
 		return -ENOMEM;
 
-	ret = xa_alloc(&liteuart_array, &dev_id, uart, limit, GFP_KERNEL);
-	if (ret)
-		return ret;
-
-	uart->id = dev_id;
 	port = &uart->port;
 
 	/* get membase */
 	port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
-	if (IS_ERR(port->membase)) {
-		ret = PTR_ERR(port->membase);
-		goto err_erase_id;
-	}
+	if (IS_ERR(port->membase))
+		return PTR_ERR(port->membase);
 
 	ret = platform_get_irq_optional(pdev, 0);
 	if (ret < 0 && ret != -ENXIO)
-		goto err_erase_id;
+		return ret;
 	if (ret > 0)
 		port->irq = ret;
 
+	/* look for aliases; auto-enumerate for free index if not found */
+	dev_id = of_alias_get_id(pdev->dev.of_node, "serial");
+	if (dev_id < 0)
+		limit = XA_LIMIT(0, CONFIG_SERIAL_LITEUART_MAX_PORTS);
+	else
+		limit = XA_LIMIT(dev_id, dev_id);
+
+	ret = xa_alloc(&liteuart_array, &dev_id, uart, limit, GFP_KERNEL);
+	if (ret)
+		return ret;
+
+	uart->id = dev_id;
 	/* values not from device tree */
 	port->dev = &pdev->dev;
 	port->iotype = UPIO_MEM;