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Message-Id: <dc7d223a5de64dc78396a98c2f034ba12dc160e1.1475144721.git.jslaby@suse.cz>
Date: Thu, 29 Sep 2016 12:24:31 +0200
From: Jiri Slaby <jslaby@...e.cz>
To: stable@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Dan Carpenter <dan.carpenter@...cle.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 035/119] ACPI / sysfs: fix error code in get_status()
From: Dan Carpenter <dan.carpenter@...cle.com>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit f18ebc211e259d4f591e39e74b2aa2de226c9a1d upstream.
The problem with ornamental, do-nothing gotos is that they lead to
"forgot to set the error code" bugs. We should be returning -EINVAL
here but we don't. It leads to an uninitalized variable in
counter_show():
drivers/acpi/sysfs.c:603 counter_show()
error: uninitialized symbol 'status'.
Fixes: 1c8fce27e275 (ACPI: introduce drivers/acpi/sysfs.c)
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
drivers/acpi/sysfs.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 05306a59aedc..f072461c5869 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -492,23 +492,22 @@ static void acpi_global_event_handler(u32 event_type, acpi_handle device,
static int get_status(u32 index, acpi_event_status *status,
acpi_handle *handle)
{
- int result = 0;
+ int result;
if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
- goto end;
+ return -EINVAL;
if (index < num_gpes) {
result = acpi_get_gpe_device(index, handle);
if (result) {
ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
"Invalid GPE 0x%x", index));
- goto end;
+ return result;
}
result = acpi_get_gpe_status(*handle, index, status);
} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
result = acpi_get_event_status(index - num_gpes, status);
-end:
return result;
}
--
2.10.0
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