[PATCH 3/4] usb: gadget: fotg210-udc: Simplify code

[Christophe JAILLET]

Use 'devm_kzalloc()' and 'devm_ioremap()' to simplify code.

While at it, turn some '== NULL' into shorter '!' when testing memory
allocation failure.

Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
 drivers/usb/gadget/udc/fotg210-udc.c | 25 ++++++++-----------------
 1 file changed, 8 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/gadget/udc/fotg210-udc.c 
b/drivers/usb/gadget/udc/fotg210-udc.c
index a4d46b9759be..99a18b14c8c2 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -1065,11 +1065,8 @@ static int fotg210_udc_remove(struct platform_device 
*pdev)
        struct fotg210_udc *fotg210 = platform_get_drvdata(pdev);
 
        usb_del_gadget_udc(&fotg210->gadget);
-       iounmap(fotg210->reg);
        free_irq(platform_get_irq(pdev, 0), fotg210);
-
        fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
-       kfree(fotg210);
 
        return 0;
 }
@@ -1096,21 +1093,22 @@ static int fotg210_udc_probe(struct platform_device 
*pdev)
        ret = -ENOMEM;
 
        /* initialize udc */
-       fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL);
-       if (fotg210 == NULL)
-               goto err_alloc;
+       fotg210 = devm_kzalloc(&pdev->dev, sizeof(struct fotg210_udc),
+                              GFP_KERNEL);
+       if (!fotg210)
+               return -ENOMEM;
 
        for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
                fotg210->ep[i] = devm_kzalloc(&pdev->dev,
                                        sizeof(struct fotg210_ep), GFP_KERNEL);
                if (!fotg210->ep[i])
-                       goto err_alloc;
+                       return -ENOMEM;
        }
 
-       fotg210->reg = ioremap(res->start, resource_size(res));
-       if (fotg210->reg == NULL) {
+       fotg210->reg = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+       if (!fotg210->reg) {
                pr_err("ioremap error.\n");
-               goto err_map;
+               return -ENOMEM;
        }
 
        spin_lock_init(&fotg210->lock);
@@ -1185,13 +1183,6 @@ static int fotg210_udc_probe(struct platform_device 
*pdev)
 err_req:
        fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
 
-err_map:
-       if (fotg210->reg)
-               iounmap(fotg210->reg);
-
-err_alloc:
-       kfree(fotg210);
-
        return ret;
 }
 
-- 
2.14.1

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