linux-kernel - [PATCH v1] virt: sev-guest: Convert to use jiffies macro

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Message-Id: <20240822073533.13148-1-chenyufan@vivo.com>
Date: Thu, 22 Aug 2024 15:35:32 +0800
From: Chen Yufan <chenyufan@...o.com>
To: Chen Yufan <chenyufan@...o.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-kernel@...r.kernel.org
Cc: opensource.kernel@...o.com
Subject: [PATCH v1] virt: sev-guest: Convert to use jiffies macro

Use time_after macro instead of using
jiffies directly to handle wraparound.

Signed-off-by: Chen Yufan <chenyufan@...o.com>
---
 drivers/virt/coco/sev-guest/sev-guest.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/virt/coco/sev-guest/sev-guest.c b/drivers/virt/coco/sev-guest/sev-guest.c
index 6fc7884ea..937f655f2 100644
--- a/drivers/virt/coco/sev-guest/sev-guest.c
+++ b/drivers/virt/coco/sev-guest/sev-guest.c
@@ -24,6 +24,7 @@
 #include <linux/cleanup.h>
 #include <linux/uuid.h>
 #include <linux/configfs.h>
+#include <linux/jiffies.h>
 #include <uapi/linux/sev-guest.h>
 #include <uapi/linux/psp-sev.h>
 
@@ -400,7 +401,7 @@ static int __handle_guest_request(struct snp_guest_dev *snp_dev, u64 exit_code,
 	 * message sequence number on a different message.
 	 */
 	case -EAGAIN:
-		if (jiffies - req_start > SNP_REQ_MAX_RETRY_DURATION) {
+		if (time_after(jiffies, req_start + SNP_REQ_MAX_RETRY_DURATION)) {
 			rc = -ETIMEDOUT;
 			break;
 		}
-- 
2.39.0