linux-kernel - [PATCH v2 1/2] Drivers: hv: util: Don't force error code to ENODEV in util

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Message-Id: <20241106154247.2271-2-mhklinux@outlook.com>
Date: Wed,  6 Nov 2024 07:42:46 -0800
From: mhkelley58@...il.com
To: kys@...rosoft.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	gregkh@...uxfoundation.org,
	vkuznets@...hat.com
Cc: linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] Drivers: hv: util: Don't force error code to ENODEV in util_probe()

From: Michael Kelley <mhklinux@...look.com>

If the util_init function call in util_probe() returns an error code,
util_probe() always return ENODEV, and the error code from the util_init
function is lost. The error message output in the caller, vmbus_probe(),
doesn't show the real error code.

Fix this by just returning the error code from the util_init function.
There doesn't seem to be a reason to force ENODEV, as other errors
such as ENOMEM can already be returned from util_probe(). And the
code in call_driver_probe() implies that ENODEV should mean that a
matching driver wasn't found, which is not the case here.

Suggested-by: Dexuan Cui <decui@...rosoft.com>
Signed-off-by: Michael Kelley <mhklinux@...look.com>
---
Changes in v2: None. This is the first version of Patch 1 of this series.
The "v2" is due to changes to Patch 2 of the series.

 drivers/hv/hv_util.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index c4f525325790..370722220134 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -590,10 +590,8 @@ static int util_probe(struct hv_device *dev,
 	srv->channel = dev->channel;
 	if (srv->util_init) {
 		ret = srv->util_init(srv);
-		if (ret) {
-			ret = -ENODEV;
+		if (ret)
 			goto error1;
-		}
 	}

 	/*
-- 
2.25.1