linux-kernel - [PATCH][next] ACPI: scan: ensure ret is initialized to avoid garbage being returned

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Message-Id: <20210609173312.298414-1-colin.king@canonical.com>
Date:   Wed,  9 Jun 2021 18:33:12 +0100
From:   Colin King <colin.king@...onical.com>
To:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        Daniel Scally <djrscally@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-acpi@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] ACPI: scan: ensure ret is initialized to avoid garbage being returned

From: Colin Ian King <colin.king@...onical.com>

In the unlikely event that there are no callback calls made then ret
will be returned as an uninitialized value. Clean up static analysis
warnings by ensuring ret is initialized.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: a9e10e587304 ("ACPI: scan: Extend acpi_walk_dep_device_list()")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/acpi/scan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index c3067e8bfc47..0945d952f0fc 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2151,7 +2151,7 @@ int acpi_walk_dep_device_list(acpi_handle handle,
 			      void *data)
 {
 	struct acpi_dep_data *dep, *tmp;
-	int ret;
+	int ret = 0;
 
 	mutex_lock(&acpi_dep_list_lock);
 	list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) {
-- 
2.31.1