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Mon, 06 Apr 2026 05:43:23 -0700 (PDT) From: Felix Gu Date: Mon, 06 Apr 2026 20:43:16 +0800 Subject: [PATCH v3 1/2] i3c: master: renesas: Fix memory leak in renesas_i3c_i3c_xfers() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260406-renesas-v3-1-4b724d7708f4@gmail.com> References: <20260406-renesas-v3-0-4b724d7708f4@gmail.com> In-Reply-To: <20260406-renesas-v3-0-4b724d7708f4@gmail.com> To: Wolfram Sang , Tommaso Merciai , Alexandre Belloni , Frank Li Cc: linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, Felix Gu X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775479398; l=1599; i=ustc.gu@gmail.com; h=from:subject:message-id; bh=Cx2s2w3meJfSfpKTacSMv/QU3Sx8jDulv3B2bNsYKQU=; b=ngZ1UVYMhz0kYIc6Gh4zPWxqI+TT9L9Uxc8oLCc7ij2AZOERHBATRPr338sBS7YtvnWD4AZoA cRTfTga8GAvAGEPV0WpNwk3v2wN6zlkLvQpJfsEvadfPWGQuLKJfUoU X-Developer-Key: i=ustc.gu@gmail.com; a=ed25519; pk=fjUXwmjchVN7Ja6KGP55IXOzFeCl9edaHoQIEUA+/hw= 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 con= troller") Tested-by: Tommaso Merciai Reviewed-by: Tommaso Merciai Reviewed-by: Frank Li Signed-off-by: Felix Gu --- 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 @@ =20 #include #include +#include #include #include #include @@ -817,13 +818,12 @@ static int renesas_i3c_i3c_xfers(struct i3c_dev_desc = *dev, struct i3c_xfer *i3c_ struct i3c_master_controller *m =3D i3c_dev_get_master(dev); struct renesas_i3c *i3c =3D to_renesas_i3c(m); struct renesas_i3c_i2c_dev_data *data =3D i3c_dev_get_master_data(dev); - struct renesas_i3c_xfer *xfer; int i; =20 /* Enable I3C bus. */ renesas_i3c_bus_enable(m, true); =20 - xfer =3D renesas_i3c_alloc_xfer(i3c, 1); + struct renesas_i3c_xfer *xfer __free(kfree) =3D renesas_i3c_alloc_xfer(i3= c, 1); 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Mon, 06 Apr 2026 05:43:25 -0700 (PDT) From: Felix Gu Date: Mon, 06 Apr 2026 20:43:17 +0800 Subject: [PATCH v3 2/2] i3c: master: renesas: Use __free(kfree) for xfer cleanup in renesas_i3c_send_ccc_cmd() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260406-renesas-v3-2-4b724d7708f4@gmail.com> References: <20260406-renesas-v3-0-4b724d7708f4@gmail.com> In-Reply-To: <20260406-renesas-v3-0-4b724d7708f4@gmail.com> To: Wolfram Sang , Tommaso Merciai , Alexandre Belloni , Frank Li Cc: linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, Felix Gu X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775479398; l=1195; i=ustc.gu@gmail.com; h=from:subject:message-id; bh=xlUiC/j9yL5DybNZPhI4F6kC9c2SBjQyoCIdTqYj+Yg=; b=4mpEaLtzU5fuoaAdSlCDh9tV03c23tMf8tpROpBTELIv8MNZjrNnK4ECmDbU/F3z7WLn+4lbn o0WBeGrI99eChlauQTQJtkT6ha+JaKiprX+FKbm6THhWYapYSMCZRsf X-Developer-Key: i=ustc.gu@gmail.com; a=ed25519; pk=fjUXwmjchVN7Ja6KGP55IXOzFeCl9edaHoQIEUA+/hw= Use __free(kfree) for automatic cleanup, matching the pattern already used in other functions in this driver. Signed-off-by: Felix Gu Reviewed-by: Frank Li Reviewed-by: Tommaso Merciai Tested-by: Tommaso Merciai --- drivers/i3c/master/renesas-i3c.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/i3c/master/renesas-i3c.c b/drivers/i3c/master/renesas-= i3c.c index a8a9e89a9710..f39c449922ca 100644 --- a/drivers/i3c/master/renesas-i3c.c +++ b/drivers/i3c/master/renesas-i3c.c @@ -748,7 +748,6 @@ static int renesas_i3c_send_ccc_cmd(struct i3c_master_c= ontroller *m, struct i3c_ccc_cmd *ccc) { struct renesas_i3c *i3c =3D to_renesas_i3c(m); - struct renesas_i3c_xfer *xfer; struct renesas_i3c_cmd *cmd; int ret, pos =3D 0; =20 @@ -758,7 +757,7 @@ static int renesas_i3c_send_ccc_cmd(struct i3c_master_c= ontroller *m, return pos; } =20 - xfer =3D renesas_i3c_alloc_xfer(i3c, 1); + struct renesas_i3c_xfer *xfer __free(kfree) =3D renesas_i3c_alloc_xfer(i3= c, 1); if (!xfer) return -ENOMEM; =20 @@ -807,8 +806,6 @@ static int renesas_i3c_send_ccc_cmd(struct i3c_master_c= ontroller *m, if (ret) ccc->err =3D I3C_ERROR_M2; =20 - kfree(xfer); - return ret; } =20 --=20 2.43.0