From 210f61949f019b171d945c251f5ae10aebf7e92e Mon Sep 17 00:00:00 2001
From: backslashxx <118538522+backslashxx@users.noreply.github.com>
Date: Tue, 24 Jun 2025 12:30:14 +0800
Subject: [PATCH] kernel: apk_sign: fix return check for ksu_sha256

upstream used IS_ERR to check for negative return and that is int,
so correct it.

This is one headache for old compilers.

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
---
 kernel/apk_sign.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/apk_sign.c b/kernel/apk_sign.c
index 7bc4493e..ad32ef61 100644
--- a/kernel/apk_sign.c
+++ b/kernel/apk_sign.c
@@ -127,7 +127,7 @@ static bool check_block(struct file *fp, u32 *size4, loff_t *pos, u32 *offset, i
 		}
 		ksu_kernel_read_compat(fp, cert, *size4, pos);
 		unsigned char digest[SHA256_DIGEST_SIZE];
-		if (IS_ERR(ksu_sha256(cert, *size4, digest))) {
+		if (ksu_sha256(cert, *size4, digest) < 0 ) {
 			pr_info("sha256 error\n");
 			return false;
 		}