linux-kernel - [PATCH net-next v3 1/3] ieee802154: ca8210: Use proper setter and getters for bitwise types

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250304112418.1774869-2-andriy.shevchenko@linux.intel.com>
Date: Tue,  4 Mar 2025 13:22:32 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-wpan@...r.kernel.org,
	netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Alexander Aring <alex.aring@...il.com>,
	Stefan Schmidt <stefan@...enfreihafen.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH net-next v3 1/3] ieee802154: ca8210: Use proper setter and getters for bitwise types

Sparse complains that the driver doesn't respect the bitwise types:

drivers/net/ieee802154/ca8210.c:1796:27: warning: incorrect type in assignment (different base types)
drivers/net/ieee802154/ca8210.c:1796:27:    expected restricted __le16 [addressable] [assigned] [usertype] pan_id
drivers/net/ieee802154/ca8210.c:1796:27:    got unsigned short [usertype]
drivers/net/ieee802154/ca8210.c:1801:25: warning: incorrect type in assignment (different base types)
drivers/net/ieee802154/ca8210.c:1801:25:    expected restricted __le16 [addressable] [assigned] [usertype] pan_id
drivers/net/ieee802154/ca8210.c:1801:25:    got unsigned short [usertype]
drivers/net/ieee802154/ca8210.c:1928:28: warning: incorrect type in argument 3 (different base types)
drivers/net/ieee802154/ca8210.c:1928:28:    expected unsigned short [usertype] dst_pan_id
drivers/net/ieee802154/ca8210.c:1928:28:    got restricted __le16 [addressable] [usertype] pan_id

Use proper setter and getters for bitwise types.

Note, in accordance with [1] the protocol is little endian.

Link: https://www.cascoda.com/wp-content/uploads/2018/11/CA-8210_datasheet_0418.pdf [1]
Reviewed-by: Miquel Raynal <miquel.raynal@...tlin.com>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/net/ieee802154/ca8210.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c
index 753215ebc67c..a036910f6082 100644
--- a/drivers/net/ieee802154/ca8210.c
+++ b/drivers/net/ieee802154/ca8210.c
@@ -1446,8 +1446,7 @@ static u8 mcps_data_request(
 	command.pdata.data_req.src_addr_mode = src_addr_mode;
 	command.pdata.data_req.dst.mode = dst_address_mode;
 	if (dst_address_mode != MAC_MODE_NO_ADDR) {
-		command.pdata.data_req.dst.pan_id[0] = LS_BYTE(dst_pan_id);
-		command.pdata.data_req.dst.pan_id[1] = MS_BYTE(dst_pan_id);
+		put_unaligned_le16(dst_pan_id, command.pdata.data_req.dst.pan_id);
 		if (dst_address_mode == MAC_MODE_SHORT_ADDR) {
 			command.pdata.data_req.dst.address[0] = LS_BYTE(
 				dst_addr->short_address
@@ -1795,12 +1794,12 @@ static int ca8210_skb_rx(
 	}
 	hdr.source.mode = data_ind[0];
 	dev_dbg(&priv->spi->dev, "srcAddrMode: %#03x\n", hdr.source.mode);
-	hdr.source.pan_id = *(u16 *)&data_ind[1];
+	hdr.source.pan_id = cpu_to_le16(get_unaligned_le16(&data_ind[1]));
 	dev_dbg(&priv->spi->dev, "srcPanId: %#06x\n", hdr.source.pan_id);
 	memcpy(&hdr.source.extended_addr, &data_ind[3], 8);
 	hdr.dest.mode = data_ind[11];
 	dev_dbg(&priv->spi->dev, "dstAddrMode: %#03x\n", hdr.dest.mode);
-	hdr.dest.pan_id = *(u16 *)&data_ind[12];
+	hdr.dest.pan_id = cpu_to_le16(get_unaligned_le16(&data_ind[12]));
 	dev_dbg(&priv->spi->dev, "dstPanId: %#06x\n", hdr.dest.pan_id);
 	memcpy(&hdr.dest.extended_addr, &data_ind[14], 8);
 
@@ -1927,7 +1926,7 @@ static int ca8210_skb_tx(
 	status =  mcps_data_request(
 		header.source.mode,
 		header.dest.mode,
-		header.dest.pan_id,
+		le16_to_cpu(header.dest.pan_id),
 		(union macaddr *)&header.dest.extended_addr,
 		skb->len - mac_len,
 		&skb->data[mac_len],
-- 
2.47.2