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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Heikki Krogerus <heikki.krogerus@linux.intel.com>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Guenter Roeck <linux@roeck-us.net>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Subject: [PATCH v2 1/1] usb: typec: tcpm: Use LE to CPU conversion when accessing msg->header
Date: Wed, 19 May 2021 13:03:58 +0300	[thread overview]
Message-ID: <20210519100358.64018-1-andriy.shevchenko@linux.intel.com> (raw)

Sparse is not happy about strict type handling:
  .../typec/tcpm/tcpm.c:2720:27: warning: restricted __le16 degrades to integer
  .../typec/tcpm/tcpm.c:2814:32: warning: restricted __le16 degrades to integer

Fix this by converting LE to CPU before use.

Fixes: ae8a2ca8a221 ("usb: typec: Group all TCPCI/TCPM code together")
Fixes: 64f7c494a3c0 ("typec: tcpm: Add support for sink PPS related messages")
Cc: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: fixed subject prefix
 drivers/usb/typec/tcpm/tcpm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 64133e586c64..8fdfd7f65ad7 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -2717,7 +2717,7 @@ static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
 	enum pd_ext_msg_type type = pd_header_type_le(msg->header);
 	unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
 
-	if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
+	if (!(le16_to_cpu(msg->ext_msg.header) & PD_EXT_HDR_CHUNKED)) {
 		tcpm_pd_handle_msg(port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS);
 		tcpm_log(port, "Unchunked extended messages unsupported");
 		return;
@@ -2811,7 +2811,7 @@ static void tcpm_pd_rx_handler(struct kthread_work *work)
 				 "Data role mismatch, initiating error recovery");
 			tcpm_set_state(port, ERROR_RECOVERY, 0);
 		} else {
-			if (msg->header & PD_HEADER_EXT_HDR)
+			if (le16_to_cpu(msg->header) & PD_HEADER_EXT_HDR)
 				tcpm_pd_ext_msg_request(port, msg);
 			else if (cnt)
 				tcpm_pd_data_request(port, msg);
-- 
2.30.2


             reply	other threads:[~2021-05-19 10:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-19 10:03 Andy Shevchenko [this message]
2021-05-19 19:05 ` [PATCH v2 1/1] usb: typec: tcpm: Use LE to CPU conversion when accessing msg->header Guenter Roeck
2021-05-20  9:27 ` Heikki Krogerus
2021-05-21  8:44 ` Adam Thomson

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