platform_get_resource and devm_ioremap effectively open codes this.

The return type of devm_platform_ioremap_resource() is also nice as it
has multiple errors that it can return.

Because it internally calls devm_request_mem_region(), reg values and
sizes cannot overlap. This was manually verified to be the case for all
talitos users.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/crypto/talitos.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index bd4cc06ee13c..bdf7549fdf0a 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -3412,7 +3412,6 @@ static int talitos_probe(struct platform_device *ofdev)
 	unsigned int num_channels;
 	int i, err;
 	int stride;
-	struct resource *res;
 
 	if (of_property_read_u32(np, "fsl,num-channels", &num_channels))
 		return -EINVAL;
@@ -3431,13 +3430,10 @@ static int talitos_probe(struct platform_device *ofdev)
 
 	spin_lock_init(&priv->reg_lock);
 
-	res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENXIO;
-	priv->reg = devm_ioremap(dev, res->start, resource_size(res));
-	if (!priv->reg) {
+	priv->reg = devm_platform_ioremap_resource(ofdev, 0);
+	if (IS_ERR(priv->reg)) {
 		dev_err(dev, "failed to of_iomap\n");
-		err = -ENOMEM;
+		err = PTR_ERR(priv->reg);
 		goto err_out;
 	}
 
-- 
2.54.0

On Thu, May 07, 2026 at 04:44:16PM -0700, Rosen Penev wrote:
> platform_get_resource and devm_ioremap effectively open codes this.
> 
> The return type of devm_platform_ioremap_resource() is also nice as it
> has multiple errors that it can return.
> 
> Because it internally calls devm_request_mem_region(), reg values and
> sizes cannot overlap. This was manually verified to be the case for all
> talitos users.
> 
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
>  drivers/crypto/talitos.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt