LoongArch/crypto: Clean up useless assignment operations

Avenger-285714 · chenhuacai · commit fea1c949f6ca · 2024-03-19T15:50:34.000+08:00
The LoongArch CRC32 hw acceleration is based on arch/mips/crypto/
crc32-mips.c. While the MIPS code supports both MIPS32 and MIPS64,
but LoongArch32 lacks the CRC instruction. As a result, the line
"len -= sizeof(u32)" is unnecessary.

Removing it can make context code style more unified and improve
code readability.

Cc: stable@vger.kernel.org
Reviewed-by: WANG Xuerui &lt;git@xen0n.name&gt;
Suggested-by: Wentao Guan &lt;guanwentao@uniontech.com&gt;
Signed-off-by: Yuli Wang &lt;wangyuli@uniontech.com&gt;
Signed-off-by: Huacai Chen &lt;chenhuacai@loongson.cn&gt;
diff --git a/arch/loongarch/crypto/crc32-loongarch.c b/arch/loongarch/crypto/crc32-loongarch.c
@@ -44,7 +44,6 @@ static u32 crc32_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
 
 		CRC32(crc, value, w);
 		p += sizeof(u32);
-		len -= sizeof(u32);
 	}
 
 	if (len & sizeof(u16)) {
@@ -80,7 +79,6 @@ static u32 crc32c_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
 
 		CRC32C(crc, value, w);
 		p += sizeof(u32);
-		len -= sizeof(u32);
 	}
 
 	if (len & sizeof(u16)) {

Original file line number	Diff line number	Diff line change
`@@ -44,7 +44,6 @@ static u32 crc32_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)`
`44`	`44`
`45`	`45`	`CRC32(crc, value, w);`
`46`	`46`	`p += sizeof(u32);`
`47`		`- len -= sizeof(u32);`
`48`	`47`	`}`
`49`	`48`
`50`	`49`	`if (len & sizeof(u16)) {`
`@@ -80,7 +79,6 @@ static u32 crc32c_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)`
`80`	`79`
`81`	`80`	`CRC32C(crc, value, w);`
`82`	`81`	`p += sizeof(u32);`
`83`		`- len -= sizeof(u32);`
`84`	`82`	`}`
`85`	`83`
`86`	`84`	`if (len & sizeof(u16)) {`