linux-kernel - [PATCH v2] misc: eeprom/idt_89hpesx: Convert data structures to LE explicitly

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Date: Wed, 31 Jan 2024 11:30:28 +0800
From: Dawei Li <dawei.li@...ngroup.cn>
To: arnd@...db.de,
	gregkh@...uxfoundation.org
Cc: fancer.lancer@...il.com,
	lkp@...el.com,
	linux-kernel@...r.kernel.org,
	set_pte_at@...look.com,
	Dawei Li <dawei.li@...ngroup.cn>
Subject: [PATCH v2] misc: eeprom/idt_89hpesx: Convert data structures to LE explicitly

Kernel test robot reports following sparse warnings:
>> drivers/misc/eeprom/idt_89hpesx.c:599:31: sparse: sparse:
   incorrect type in assignment (different base types) @@
   expected unsigned short [addressable] [assigned] [usertype]
   memaddr @@     got restricted __le16 [usertype] @@

   drivers/misc/eeprom/idt_89hpesx.c:599:31: sparse:
   expected unsigned short [addressable] [assigned] [usertype]
   memaddr

   drivers/misc/eeprom/idt_89hpesx.c:599:31: sparse:
   restricted __le16 [usertype]

   .....

For data structures needs cpu_to_le* conversion, their prototype need
to be declared with __le* explicitly.

Declare data structures to __le* explicitly to address the issue:
- struct idt_eeprom_seq::memaddr
- struct idt_csr_seq::csraddr
- struct idt_csr_seq::data

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202401261250.b07Yt30Z-lkp@intel.com/
Signed-off-by: Dawei Li <dawei.li@...ngroup.cn>
Reviewed-by: Serge Semin <fancer.lancer@...il.com>
---
v1 -> v2:
- Add sparse warning info from Kernel test robot.
- Remove Fixes & cc stable tag.
- Add Reviewed-by from Serge.

v1: https://lore.kernel.org/all/20240130040632.3039911-1-dawei.li@shingroup.cn/

 drivers/misc/eeprom/idt_89hpesx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/eeprom/idt_89hpesx.c b/drivers/misc/eeprom/idt_89hpesx.c
index d807d08e2614..327afb866b21 100644
--- a/drivers/misc/eeprom/idt_89hpesx.c
+++ b/drivers/misc/eeprom/idt_89hpesx.c
@@ -129,7 +129,7 @@ struct idt_smb_seq {
 struct idt_eeprom_seq {
 	u8 cmd;
 	u8 eeaddr;
-	u16 memaddr;
+	__le16 memaddr;
 	u8 data;
 } __packed;
 
@@ -141,8 +141,8 @@ struct idt_eeprom_seq {
  */
 struct idt_csr_seq {
 	u8 cmd;
-	u16 csraddr;
-	u32 data;
+	__le16 csraddr;
+	__le32 data;
 } __packed;
 
 /*
-- 
2.27.0