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Message-Id: <20230123191741.79751-1-andriy.shevchenko@linux.intel.com>
Date: Mon, 23 Jan 2023 21:17:41 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Gabriel Somlo <gsomlo@...il.com>,
Jiri Slaby <jirislaby@...nel.org>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Karol Gugala <kgugala@...micro.com>,
Mateusz Holenko <mholenko@...micro.com>,
Joel Stanley <joel@....id.au>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] 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@...ux.intel.com>
---
drivers/tty/serial/liteuart.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)
diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c
index 192ad681de35..562892395570 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;
--
2.39.0
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