crypto: atmel-tdes - Switch to managed version of kzalloc

This patch switches data allocation from kzalloc to devm_kzalloc.
It also removes some kfree() on data that was earlier allocated
using devm_kzalloc() from probe as well as remove funtions.

CC: Herbert Xu <herbert@gondor.apana.org.au>
CC: "David S. Miller" <davem@davemloft.net>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/atmel-tdes.c

@@ -1337,7 +1337,6 @@ static struct crypto_platform_data *atmel_tdes_of_init(struct platform_device *p
 					GFP_KERNEL);
 	if (!pdata->dma_slave) {
 		dev_err(&pdev->dev, "could not allocate memory for dma_slave\n");
-		devm_kfree(&pdev->dev, pdata);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -1359,7 +1358,7 @@ static int atmel_tdes_probe(struct platform_device *pdev)
 	unsigned long tdes_phys_size;
 	int err;
 
-	tdes_dd = kzalloc(sizeof(struct atmel_tdes_dev), GFP_KERNEL);
+	tdes_dd = devm_kmalloc(&pdev->dev, sizeof(*tdes_dd), GFP_KERNEL);
 	if (tdes_dd == NULL) {
 		dev_err(dev, "unable to alloc data struct.\n");
 		err = -ENOMEM;
@@ -1483,8 +1482,6 @@ static int atmel_tdes_probe(struct platform_device *pdev)
 res_err:
 	tasklet_kill(&tdes_dd->done_task);
 	tasklet_kill(&tdes_dd->queue_task);
-	kfree(tdes_dd);
-	tdes_dd = NULL;
 tdes_dd_err:
 	dev_err(dev, "initialization failed.\n");
 
@@ -1519,9 +1516,6 @@ static int atmel_tdes_remove(struct platform_device *pdev)
 	if (tdes_dd->irq >= 0)
 		free_irq(tdes_dd->irq, tdes_dd);
 
-	kfree(tdes_dd);
-	tdes_dd = NULL;
-
 	return 0;
 }