From patchwork Tue Mar 19 07:43:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kyle Tso X-Patchwork-Id: 781809 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 470D23BBCA for ; Tue, 19 Mar 2024 07:43:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710834214; cv=none; b=rzISjApDboeSAXY1ttQY4eu3q5Lbh8LejQd5ApViosjZK3AGuHKOXwLYJFxyFxXJYzritHz3jdMMvZz/kCzWv+p3hSNILpbLg4+7MSiktCbOLIOFD+CkI2O7tCteoas3tYIU/ByGOvyixtvMP8k1Kk5mB/triivJWGU1dUayS1E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710834214; c=relaxed/simple; bh=HD6kQ+ioRHxPGSTP8IsOyUFZW7mQgOF13zNVMkezjnM=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=U1lcEmNwAhAz1LcUM4VjadO0gXHYRupA/h+3AImRUn1DSGNbzlpOKZ2j2A4iM3ZKSZ5ehdWWC2MtBmTB21h7HNdGmof5JSoFPWDlcw1W4V0TLYWVRXecprSb1llzEclTp58KH1khcLB9FzJpFES/7ZuTTyTzudGvmsp3dDzxshI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--kyletso.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=VrvtbxoS; arc=none smtp.client-ip=209.85.219.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--kyletso.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="VrvtbxoS" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-dc6b26ce0bbso9993675276.1 for ; Tue, 19 Mar 2024 00:43:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1710834211; x=1711439011; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=OnwyORFqYkzH8hHLHjIf5KeiogbCHS6CJlbafRrvsPA=; b=VrvtbxoSY3waMrjWNC/AGaYlDvPANZv8vkPkRNMbz9UgTAWSy62LIQRz98qIMSHMqu Pt3M11+reS1L4uLeFR0zx+7Xs1tL+lGv1s/LL+bAuZdr4Gp7UCpTuabNpZH1SM4airGt yNsksEe4o8wUMXsfv8Df7RnNTgNTHa/jlv0UVm93/u5Me3nSAfXlYgCbLmlo+sAQFaJo rEBN5IxygtAmvjzYep9h3Zu8iyDUA1s3qDyeCRk6XwAX8dfxIm8C+cjNMFSDN7EXW2sY ifvjDihmShjE4UnbI32sd3KhFmAeOLi+4qvJZ6lUr8T2wMZrge6K7GvHWyKsRbwGM1WQ 7fmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710834211; x=1711439011; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=OnwyORFqYkzH8hHLHjIf5KeiogbCHS6CJlbafRrvsPA=; b=U/lYoRb6IdpwIU8xf9urdNI3zPKypB0a1NUcwzLVb3fWjIM4AOQ0UcLJREPL36J3zB l4sLqFmdQfg4oa8m6S4/HKZPe+ZkQp4Mv9beVbBAUozppHI+RQQIOZdm/RemBjC/KP9u AAnOEuX96qrA4w7u9ilIHxXHybwvcjUYnEiw0MFmHOiMMvQfV7c9hmOgpPkaXYntNTVW +fqD31Y9s6oMbVjRoLOSxYt1+cLVI5ga8AMr+7PTZZovi3EVtlZJswzmaf1j2m+M/zC7 oXxNB0jdfBhLMyof0CJDjL4V1JygPwt8lFTJlwL8c1RjFCZDcwbIGO3bFp5kvbRe+bjv blrQ== X-Forwarded-Encrypted: i=1; AJvYcCVRafxxOXGyFhA6+5sGAgqEL2b7MDnCT/IuiCbYvvgELithiefdOzYvD6f8Z/bSdYoIu1L1Rv/aWHfHh+1FNJ0Plg0DitRCulPX X-Gm-Message-State: AOJu0YwVpMiXVarcCjSTgnZXpDjMDaZ85Ucx6s9Rqu3XPDiSTBjm2yM7 5imkJvkl6FMLZNPJECknvDqkL6Yfl49/VQ5Syrn3vglycHXyX7uHSS+A1m8zeBC/L/32QHsLiO7 1sXeJpg== X-Google-Smtp-Source: AGHT+IH6atxfqMs0Z5PSMVfV6XRX3NOJZvi6OTsXrgS1I78Y0u2K25gag5+nyxOg0DCLkK9hS6meBUKwHlq3 X-Received: from kyletso-p620lin01.ntc.corp.google.com ([2401:fa00:fc:202:2f6c:fc01:709:12f4]) (user=kyletso job=sendgmr) by 2002:a05:6902:e09:b0:dc6:dfd9:d431 with SMTP id df9-20020a0569020e0900b00dc6dfd9d431mr394859ybb.1.1710834211438; Tue, 19 Mar 2024 00:43:31 -0700 (PDT) Date: Tue, 19 Mar 2024 15:43:09 +0800 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.44.0.291.gc1ea87d7ee-goog Message-ID: <20240319074309.3306579-1-kyletso@google.com> Subject: [PATCH v1] usb: typec: Return size of buffer if pd_set operation succeeds From: Kyle Tso To: linux@roeck-us.net, heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org Cc: badhri@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Kyle Tso , stable@vger.kernel.org The attribute writing should return the number of bytes used from the buffer on success. Fixes: a7cff92f0635 ("usb: typec: USB Power Delivery helpers for ports and partners") Cc: stable@vger.kernel.org Signed-off-by: Kyle Tso Reviewed-by: Heikki Krogerus --- drivers/usb/typec/class.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 389c7f0b8d93..9610e647a8d4 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -1310,6 +1310,7 @@ static ssize_t select_usb_power_delivery_store(struct device *dev, { struct typec_port *port = to_typec_port(dev); struct usb_power_delivery *pd; + int ret; if (!port->ops || !port->ops->pd_set) return -EOPNOTSUPP; @@ -1318,7 +1319,11 @@ static ssize_t select_usb_power_delivery_store(struct device *dev, if (!pd) return -EINVAL; - return port->ops->pd_set(port, pd); + ret = port->ops->pd_set(port, pd); + if (ret) + return ret; + + return size; } static ssize_t select_usb_power_delivery_show(struct device *dev,