[PATCH v2] 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 at gmail.com>
---
Changes in v2:
- Add cleanup header file to fix Frank's comment.
- Link to v1: https://lore.kernel.org/r/20260402-renesas-v1-1-369a7d867502@gmail.com
---
 drivers/i3c/master/renesas-i3c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i3c/master/renesas-i3c.c b/drivers/i3c/master/renesas-i3c.c
index d9f5b30a4b2f..a8a9e89a9710 100644
--- a/drivers/i3c/master/renesas-i3c.c
+++ b/drivers/i3c/master/renesas-i3c.c
@@ -8,6 +8,7 @@
 
 #include <linux/bitfield.h>
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/clk.h>
 #include <linux/completion.h>
 #include <linux/err.h>
@@ -817,13 +818,12 @@ 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 at gmail.com>