crypto: dcp - Use devm_* APIs

devm_* APIs are device managed and make cleanup and exit
code simpler.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Tested-by: Tobias Rauter <tobiasrauter@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 10 insertions, 22 deletions

diff --git a/drivers/crypto/dcp.c b/drivers/crypto/dcp.c
index 83eaefcefb64..9e91c2cf3bf8 100644
--- a/drivers/crypto/dcp.c
+++ b/drivers/crypto/dcp.c
@@ -723,12 +723,10 @@ static int dcp_probe(struct platform_device *pdev)
         struct resource *r;
         int i, ret, j;
 
-        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-        if (dev == NULL) {
-                dev_err(&pdev->dev, "Failed to allocate structure\n");
-                ret = -ENOMEM;
-                goto err;
-        }
+        dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+        if (!dev)
+                return -ENOMEM;
+
         global_dev = dev;
         dev->dev = &pdev->dev;
 
@@ -737,11 +735,10 @@ static int dcp_probe(struct platform_device *pdev)
         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!r) {
                 dev_err(&pdev->dev, "failed to get IORESOURCE_MEM\n");
-                ret = -ENXIO;
-                goto err_dev;
+                return -ENXIO;
         }
-        dev->dcp_regs_base = ioremap(r->start, resource_size(r));
-
+        dev->dcp_regs_base = devm_ioremap(&pdev->dev, r->start,
+                                          resource_size(r));
 
         dcp_set(dev, DCP_CTRL_SFRST, DCP_REG_CTRL);
         udelay(10);
@@ -762,15 +759,13 @@ static int dcp_probe(struct platform_device *pdev)
         r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
         if (!r) {
                 dev_err(&pdev->dev, "can't get IRQ resource (0)\n");
-                ret = -EIO;
-                goto err_unmap_mem;
+                return -EIO;
         }
         dev->dcp_vmi_irq = r->start;
         ret = request_irq(dev->dcp_vmi_irq, dcp_vmi_irq, 0, "dcp", dev);
         if (ret != 0) {
                 dev_err(&pdev->dev, "can't request_irq (0)\n");
-                ret = -EIO;
-                goto err_unmap_mem;
+                return -EIO;
         }
 
         r = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
@@ -863,11 +858,7 @@ err_free_irq1:
         free_irq(dev->dcp_irq, dev);
 err_free_irq0:
         free_irq(dev->dcp_vmi_irq, dev);
-err_unmap_mem:
-        iounmap((void *) dev->dcp_regs_base);
-err_dev:
-        kfree(dev);
-err:
+
         return ret;
 }
 
@@ -890,14 +881,11 @@ static int dcp_remove(struct platform_device *pdev)
         tasklet_kill(&dev->done_task);
         tasklet_kill(&dev->queue_task);
 
-        iounmap((void *) dev->dcp_regs_base);
-
         for (j = 0; j < ARRAY_SIZE(algs); j++)
                 crypto_unregister_alg(&algs[j]);
 
         misc_deregister(&dev->dcp_bootstream_misc);
 
-        kfree(dev);
         return 0;
 }