From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F258C30E84F; Sat, 12 Sep 2026 14:00:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789221607; cv=none; b=Euf67zmAbjefgPUlZnPU1I01map9t0w5hjRyO78+lKppG3CoTOr+gOOTNuwkIiSJuEY7JdEwGnRXE3k1cEWitj3oLJex+5xrxXxMxE0gqmbFMyEYvHlB/FDzj1jx/hdGibpVg0CkNJwm32H4IIHcLTxBtb8CmxZfc7HCg/s9GT8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789221607; c=relaxed/simple; bh=rUjcd010EY8XsqRSmqpVvpILBYhdcR3eCMhPM3M+268=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YBLUeSQN4O6bGtg8u5bjBalz1I0QEFfKCgsekL6NsTVhOZ1M3PmemkgMBAFHpr7NW4eqjfgjPPle2rOqreRhaIeuT0j+idxTm6ofLVNq7fkGcU87GXl8Qc8N6sIq2C7F2wNsHeicPbKJFTcL3wFIb1WYbAd0mAcoyO+Uyctvxlg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZH7Cvwcz; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ZH7Cvwcz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 11E571F00893; Sat, 12 Sep 2026 14:00:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789221605; bh=RbFVRRZQoWfiECzIEGI1KdKjqitraXRPgmLWp3VtLDw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ZH7Cvwcz9NDNV0/NhIGbCbJX7GLLCPHWp1EOLbnS+CWHg6lNdL20pGUHHTGJHc/ms wjP5+xnh+nFzT34l2SPZngQfC1pH+Plw5MNCtgwBNcX0VYLFuVMg2iCLbyhZUhj5G8 iP45CZ//DxabffCYq0K8dUhhXtN5zWuD2+zImcDI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Cong Nguyen , Linus Walleij , Joshua Crofts , David Lechner , Jonathan Cameron Subject: [PATCH 6.6 0417/1424] iio: gyro: mpu3050: fix sign of raw angular velocity readings Date: Sat, 12 Sep 2026 08:47:29 +0200 Message-ID: <20260912065616.620215979@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.279695368@linuxfoundation.org> References: <20260912065607.279695368@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cong Nguyen commit 06fab97602fe400bea843176f485bbac07a668e2 upstream. The MPU-3050 gyroscope output registers hold 16-bit two's complement values; the angular velocity channels are declared with .sign = 's'. When mpu3050_read_raw() handles IIO_CHAN_INFO_RAW it reads the register via a big-endian regmap_bulk_read() and assigns it with: *val = be16_to_cpu(raw_val); be16_to_cpu() yields an unsigned 16-bit quantity, so negative rates (bit 15 set) are reported to userspace as large positive integers (e.g. -1 becomes 65535) instead of the correct negative value. Cast to s16 before the assignment, matching the temperature channel a few lines above which already handles the sign correctly. Fixes: 3904b28efb2c ("iio: gyro: Add driver for the MPU-3050 gyroscope") Cc: stable@vger.kernel.org Assisted-by: Claude:claude-opus-4 Signed-off-by: Cong Nguyen Reviewed-by: Linus Walleij Reviewed-by: Joshua Crofts Reviewed-by: David Lechner Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/gyro/mpu3050-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/gyro/mpu3050-core.c +++ b/drivers/iio/gyro/mpu3050-core.c @@ -356,7 +356,7 @@ static int mpu3050_read_raw(struct iio_d goto out_read_raw_unlock; } - *val = be16_to_cpu(raw_val); + *val = (s16)be16_to_cpu(raw_val); ret = IIO_VAL_INT; goto out_read_raw_unlock;