serial/amba-pl011: use devm_* managed resources

This switches a bunch of allocation and remapping to use the
devm_* garbage collected methods and cleans up the error
path and remove() paths consequently.

devm_ioremap() is only in <linux/io.h> so fix up the
erroneous <asm/*> include as well.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Domenico Andreoli <domenico.andreoli@linux.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 16 deletions

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index d7e1edec50b5..7fca4022a8b2 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -56,8 +56,7 @@
 #include <linux/of_device.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/sizes.h>
-
-#include <asm/io.h>
+#include <linux/io.h>
 
 #define UART_NR                 14
 
@@ -1973,7 +1972,8 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
                 goto out;
         }
 
-        uap = kzalloc(sizeof(struct uart_amba_port), GFP_KERNEL);
+        uap = devm_kzalloc(&dev->dev, sizeof(struct uart_amba_port),
+                           GFP_KERNEL);
         if (uap == NULL) {
                 ret = -ENOMEM;
                 goto out;
@@ -1981,16 +1981,17 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
 
         i = pl011_probe_dt_alias(i, &dev->dev);
 
-        base = ioremap(dev->res.start, resource_size(&dev->res));
+        base = devm_ioremap(&dev->dev, dev->res.start,
+                            resource_size(&dev->res));
         if (!base) {
                 ret = -ENOMEM;
-                goto free;
+                goto out;
         }
 
         uap->pinctrl = devm_pinctrl_get(&dev->dev);
         if (IS_ERR(uap->pinctrl)) {
                 ret = PTR_ERR(uap->pinctrl);
-                goto unmap;
+                goto out;
         }
         uap->pins_default = pinctrl_lookup_state(uap->pinctrl,
                                                  PINCTRL_STATE_DEFAULT);
@@ -2002,10 +2003,10 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
         if (IS_ERR(uap->pins_sleep))
                 dev_dbg(&dev->dev, "could not get sleep pinstate\n");
 
-        uap->clk = clk_get(&dev->dev, NULL);
+        uap->clk = devm_clk_get(&dev->dev, NULL);
         if (IS_ERR(uap->clk)) {
                 ret = PTR_ERR(uap->clk);
-                goto unmap;
+                goto out;
         }
 
         uap->vendor = vendor;
@@ -2038,11 +2039,6 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
                 amba_set_drvdata(dev, NULL);
                 amba_ports[i] = NULL;
                 pl011_dma_remove(uap);
-                clk_put(uap->clk);
- unmap:
-                iounmap(base);
- free:
-                kfree(uap);
         }
  out:
         return ret;
@@ -2062,9 +2058,6 @@ static int pl011_remove(struct amba_device *dev)
                         amba_ports[i] = NULL;
 
         pl011_dma_remove(uap);
-        iounmap(uap->port.membase);
-        clk_put(uap->clk);
-        kfree(uap);
         return 0;
 }