[PATCH] i3c: master: renesas: Fix memory leak in renesas_i3c_i3c_xfers()

[PATCH] i3c: master: renesas: Fix memory leak in renesas_i3c_i3c_xfers()

[Felix Gu]

The xfer structure allocated by renesas_i3c_alloc_xfer() was never freed
in the renesas_i3c_i3c_xfers() function. Use the __free(kfree) cleanup
attribute to automatically free the memory when the variable goes out of
scope.

Fixes: d028219a9f14 ("i3c: master: Add basic driver for the Renesas I3C controller")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
---
 drivers/i3c/master/renesas-i3c.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/i3c/master/renesas-i3c.c b/drivers/i3c/master/renesas-i3c.c
index d9f5b30a4b2f..11f2d6f7c701 100644
--- a/drivers/i3c/master/renesas-i3c.c
+++ b/drivers/i3c/master/renesas-i3c.c
@@ -817,13 +817,12 @@ static int renesas_i3c_i3c_xfers(struct i3c_dev_desc *dev, struct i3c_xfer *i3c_
 	struct i3c_master_controller *m = i3c_dev_get_master(dev);
 	struct renesas_i3c *i3c = to_renesas_i3c(m);
 	struct renesas_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
-	struct renesas_i3c_xfer *xfer;
 	int i;
 
 	/* Enable I3C bus. */
 	renesas_i3c_bus_enable(m, true);
 
-	xfer = renesas_i3c_alloc_xfer(i3c, 1);
+	struct renesas_i3c_xfer *xfer __free(kfree) = renesas_i3c_alloc_xfer(i3c, 1);
 	if (!xfer)
 		return -ENOMEM;
 

---
base-commit: bd0f139e5fc11182777b81cefc3893ea508544ec
change-id: 20260402-renesas-c6afdaf9bc2e

Best regards,
-- 
Felix Gu <ustc.gu@gmail.com>

Re: [PATCH] i3c: master: renesas: Fix memory leak in renesas_i3c_i3c_xfers()

[Frank Li]

On Thu, Apr 02, 2026 at 09:05:48PM +0800, Felix Gu wrote:
> The xfer structure allocated by renesas_i3c_alloc_xfer() was never freed
> in the renesas_i3c_i3c_xfers() function. Use the __free(kfree) cleanup
> attribute to automatically free the memory when the variable goes out of
> scope.
>
> Fixes: d028219a9f14 ("i3c: master: Add basic driver for the Renesas I3C controller")
> Signed-off-by: Felix Gu <ustc.gu@gmail.com>
> ---
>  drivers/i3c/master/renesas-i3c.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/i3c/master/renesas-i3c.c b/drivers/i3c/master/renesas-i3c.c
> index d9f5b30a4b2f..11f2d6f7c701 100644
> --- a/drivers/i3c/master/renesas-i3c.c
> +++ b/drivers/i3c/master/renesas-i3c.c
> @@ -817,13 +817,12 @@ static int renesas_i3c_i3c_xfers(struct i3c_dev_desc *dev, struct i3c_xfer *i3c_
>  	struct i3c_master_controller *m = i3c_dev_get_master(dev);
>  	struct renesas_i3c *i3c = to_renesas_i3c(m);
>  	struct renesas_i3c_i2c_dev_data *data = i3c_dev_get_master_data(dev);
> -	struct renesas_i3c_xfer *xfer;
>  	int i;
>
>  	/* Enable I3C bus. */
>  	renesas_i3c_bus_enable(m, true);
>
> -	xfer = renesas_i3c_alloc_xfer(i3c, 1);
> +	struct renesas_i3c_xfer *xfer __free(kfree) = renesas_i3c_alloc_xfer(i3c, 1);


Add include <cleanup.h>

Frank
>  	if (!xfer)
>  		return -ENOMEM;
>
>
> ---
> base-commit: bd0f139e5fc11182777b81cefc3893ea508544ec
> change-id: 20260402-renesas-c6afdaf9bc2e
>
> Best regards,
> --
> Felix Gu <ustc.gu@gmail.com>
>