[PATCH v2 1/2] soc: fsl: dpio: Use scope-based resource management in dpaa2_io_store_create()

[Markus Elfring]

From: Markus Elfring <elfr...@users.sourceforge.net>
Date: Mon, 6 Jul 2026 10:34:43 +0200

Scope-based resource management became supported for some
programming interfaces by contributions of Peter Zijlstra on 2023-05-26.
See also the commit 54da6a0924311c7cf5015533991e44fb8eb12773 ("locking:
Introduce __cleanup() based infrastructure").

* Thus use the attribute “__free(kfree)”.

* Reduce the scope for the local variable “ret”.

* Omit two kfree() calls accordingly.

* Omit the local variable “size” (for another memory allocation).

* Use the macro call “return_ptr(ret)” at the end.

Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net>
---
 drivers/soc/fsl/dpio/dpio-service.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/soc/fsl/dpio/dpio-service.c 
b/drivers/soc/fsl/dpio/dpio-service.c
index 317ca50b0c2b..b252c3c7fa65 100644
--- a/drivers/soc/fsl/dpio/dpio-service.c
+++ b/drivers/soc/fsl/dpio/dpio-service.c
@@ -652,23 +652,17 @@ EXPORT_SYMBOL_GPL(dpaa2_io_service_acquire);
 struct dpaa2_io_store *dpaa2_io_store_create(unsigned int max_frames,
                                             struct device *dev)
 {
-       struct dpaa2_io_store *ret;
-       size_t size;
-
        if (!max_frames || (max_frames > 32))
                return NULL;
 
-       ret = kmalloc_obj(*ret);
+       struct dpaa2_io_store *ret __free(kfree) = kmalloc_obj(*ret);
        if (!ret)
                return NULL;
 
        ret->max = max_frames;
-       size = max_frames * sizeof(struct dpaa2_dq) + 64;
-       ret->alloced_addr = kzalloc(size, GFP_KERNEL);
-       if (!ret->alloced_addr) {
-               kfree(ret);
+       ret->alloced_addr = kzalloc(max_frames * sizeof(struct dpaa2_dq) + 64, 
GFP_KERNEL);
+       if (!ret->alloced_addr)
                return NULL;
-       }
 
        ret->vaddr = PTR_ALIGN(ret->alloced_addr, 64);
        ret->paddr = dma_map_single(dev, ret->vaddr,
@@ -676,14 +670,13 @@ struct dpaa2_io_store *dpaa2_io_store_create(unsigned int 
max_frames,
                                    DMA_FROM_DEVICE);
        if (dma_mapping_error(dev, ret->paddr)) {
                kfree(ret->alloced_addr);
-               kfree(ret);
                return NULL;
        }
 
        ret->idx = 0;
        ret->dev = dev;
 
-       return ret;
+       return_ptr(ret);
 }
 EXPORT_SYMBOL_GPL(dpaa2_io_store_create);
 
-- 
2.54.0