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Wed, 11 Jun 2025 15:42:50 -0700 (PDT) From: David Lechner Date: Wed, 11 Jun 2025 17:39:09 -0500 Subject: [PATCH 17/28] iio: imu: inv_mpu6050: use = { } instead of memset() 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: <20250611-iio-zero-init-stack-with-instead-of-memset-v1-17-ebb2d0a24302@baylibre.com> References: <20250611-iio-zero-init-stack-with-instead-of-memset-v1-0-ebb2d0a24302@baylibre.com> In-Reply-To: <20250611-iio-zero-init-stack-with-instead-of-memset-v1-0-ebb2d0a24302@baylibre.com> To: Michael Hennerich , Lars-Peter Clausen , Jonathan Cameron , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Matthias Brugger , AngeloGioacchino Del Regno , Heiko Stuebner , Maxime Coquelin , Alexandre Torgue , Francesco Dolcini , =?utf-8?q?Jo=C3=A3o_Paulo_Gon=C3=A7alves?= , =?utf-8?q?Leonard_G=C3=B6hrs?= , kernel@pengutronix.de, Oleksij Rempel , Roan van Dijk , Tomasz Duszynski , Jacopo Mondi , Jean-Baptiste Maneyrol , Mudit Sharma , Javier Carrasco , =?utf-8?q?Ond=C5=99ej_Jirman?= , Andreas Klinger , Petre Rodan Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2147; i=dlechner@baylibre.com; h=from:subject:message-id; bh=NMgmVVL3w5aWTWvBC+xusdF+bAVkf9GZ8B3SAIKd/as=; b=owEBbQGS/pANAwAKAcLMIAH/AY/AAcsmYgBoSgX0U8uxbbKAo49fqrCappc+c/T/hCIP3Y0dC FOJqlflsliJATMEAAEKAB0WIQTsGNmeYg6D1pzYaJjCzCAB/wGPwAUCaEoF9AAKCRDCzCAB/wGP wL4lB/9xRpYrOL5Dj/pVmFpiHVwrPZM5pGRIEo0tTLcH/Q5JOsLHQ5o/dbIirg/cJUikFfWLQ1G B7dqgu1hAl2Md4Pk6GklQzFpnaL0IqNcpDktycC3rp7CqezQvYDEGRcuC/yUKNmBLrL1HXOhMRu dFj7jXb/+0YU55sXaMa1UFfO2HiipdgqV0VoMprzCz8d6D6awosWDwQteOQXp56VLuseeqIvY5D bhcFYRq6FJO79v0KxUsdYYvTaGAhGGdrxJMabQ/o+fRiSHpy1dkzRXUnLMkM+Qf/Fgbfp1xFNWk WGqVvxJtN90stHJuDSbPGOqyJqWTW5GIY/9TYdSUXGc8gS0j X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Use { } instead of memset() to zero-initialize stack memory to simplify the code. Signed-off-by: David Lechner --- drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c | 4 +--- drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 6 ++---- 2 files changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c b/drivers/iio/imu/i= nv_mpu6050/inv_mpu_acpi.c index a9bcf02e5b43fac0e210c6f78816a3c042b52f3d..460792ed27e03192464066dfa08= 8734f0b6b1cdf 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_acpi.c @@ -130,12 +130,10 @@ int inv_mpu_acpi_create_mux_client(struct i2c_client = *client) =20 st->mux_client =3D NULL; if (adev) { - struct i2c_board_info info; + struct i2c_board_info info =3D { }; struct i2c_client *mux_client; int ret =3D -1; =20 - memset(&info, 0, sizeof(info)); - dmi_check_system(inv_mpu_dev_list); switch (matched_product_name) { case INV_MPU_ASUS_T100TA: diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/i= nv_mpu6050/inv_mpu_ring.c index 273196e647a2b5a4860e18cfa34a088c773540e4..c4c11124f92f7fa6730e7443e3b= e67d920b8c115 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -50,7 +50,8 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) u16 fifo_count; u32 fifo_period; s64 timestamp; - u8 data[INV_MPU6050_OUTPUT_DATA_SIZE] __aligned(8); + /* clear internal data buffer for avoiding kernel data leak */ + u8 data[INV_MPU6050_OUTPUT_DATA_SIZE] __aligned(8) =3D { }; size_t i, nb; =20 mutex_lock(&st->lock); @@ -103,9 +104,6 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) inv_sensors_timestamp_interrupt(&st->timestamp, 1, pf->timestamp); inv_sensors_timestamp_apply_odr(&st->timestamp, fifo_period, 1, 0); =20 - /* clear internal data buffer for avoiding kernel data leak */ - memset(data, 0, sizeof(data)); - /* read all data once and process every samples */ result =3D regmap_noinc_read(st->map, st->reg->fifo_r_w, st->data, fifo_c= ount); if (result) --=20 2.43.0