linux-kernel - [PATCH v2] drivers: hv: vmbus: Clean up sscanf format specifier in target_cpu

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Message-ID: <20250917085933.129306-1-alok.a.tiwari@oracle.com>
Date: Wed, 17 Sep 2025 01:59:31 -0700
From: Alok Tiwari <alok.a.tiwari@...cle.com>
To: mhklinux@...look.com, kys@...rosoft.com, haiyangz@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com, linux-hyperv@...r.kernel.org
Cc: alok.a.tiwari@...cle.com, linux-kernel@...r.kernel.org
Subject: [PATCH v2] drivers: hv: vmbus: Clean up sscanf format specifier in target_cpu_store()

The target_cpu_store() function parses the target CPU from the sysfs
buffer using sscanf(). The format string currently uses "%uu", which
is redundant. The compiler ignores the extra "u", so there is no
incorrect parsing at runtime.

Update the format string to use "%u" for clarity and consistency.

Signed-off-by: Alok Tiwari <alok.a.tiwari@...cle.com>
---
v1 -> v2
Rephrase commit message and subject to clarify
that there is no incorrect parsing at runtime.
---
 drivers/hv/vmbus_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 5b4f8d009ca5..69591dc7bad2 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1742,7 +1742,7 @@ static ssize_t target_cpu_store(struct vmbus_channel *channel,
 	u32 target_cpu;
 	ssize_t ret;
 
-	if (sscanf(buf, "%uu", &target_cpu) != 1)
+	if (sscanf(buf, "%u", &target_cpu) != 1)
 		return -EIO;
 
 	cpus_read_lock();
-- 
2.50.1