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[45.117.96.243]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5ceac77051csm526749a12.32.2024.10.31.05.31.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 31 Oct 2024 05:31:30 -0700 (PDT) From: Charles Wang To: dmitry.torokhov@gmail.com, hbarnor@chromium.org Cc: jikos@kernel.org, bentiss@kernel.org, dianders@chromium.org, dan.carpenter@linaro.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Charles Wang Subject: [PATCH v2 1/2] HID: hid-goodix: Return 0 when receiving an empty HID feature package Date: Thu, 31 Oct 2024 20:31:12 +0800 Message-ID: <20241031123113.18843-2-charles.goodix@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241031123113.18843-1-charles.goodix@gmail.com> References: <20241031123113.18843-1-charles.goodix@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Align with the i2c-hid driver by returning 0 instead of -EINVAL when an empty response is received, ensuring that userspace programs utilizing the hidraw node receive consistent return values. Signed-off-by: Charles Wang --- drivers/hid/hid-goodix-spi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-goodix-spi.c b/drivers/hid/hid-goodix-spi.c index 0f87bf9c6..077a91ee1 100644 --- a/drivers/hid/hid-goodix-spi.c +++ b/drivers/hid/hid-goodix-spi.c @@ -356,7 +356,7 @@ static int goodix_hid_check_ack_status(struct goodix_ts= _data *ts, u32 *resp_len) dev_err(ts->dev, "hrd.size too short: %d", len); return -EINVAL; } - *resp_len =3D len; + *resp_len =3D len - GOODIX_HID_PKG_LEN_SIZE; return 0; } =20 @@ -446,7 +446,10 @@ static int goodix_hid_get_raw_report(struct hid_device= *hid, if (error) return error; =20 - len =3D min(len, response_data_len - GOODIX_HID_PKG_LEN_SIZE); + /* Empty reprot response */ + if (!response_data_len) + return 0; + len =3D min(len, response_data_len); /* Step3: read response data(skip 2bytes of hid pkg length) */ error =3D goodix_spi_read(ts, ts->hid_report_addr + GOODIX_HID_ACK_HEADER_SIZE + --=20 2.43.0