* [patch] ACPI / sysfs: fix error code in get_status()
@ 2016-05-05 13:23 ` Dan Carpenter
0 siblings, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2016-05-05 13:23 UTC (permalink / raw)
To: Rafael J. Wysocki, Zhang Rui
Cc: Len Brown, linux-acpi, linux-kernel, kernel-janitors
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@oracle.com>
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 0243d37..4b3a9e2 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -555,23 +555,22 @@ 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;
}
^ permalink raw reply related [flat|nested] 4+ messages in thread* [patch] ACPI / sysfs: fix error code in get_status()
@ 2016-05-05 13:23 ` Dan Carpenter
0 siblings, 0 replies; 4+ messages in thread
From: Dan Carpenter @ 2016-05-05 13:23 UTC (permalink / raw)
To: Rafael J. Wysocki, Zhang Rui
Cc: Len Brown, linux-acpi, linux-kernel, kernel-janitors
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@oracle.com>
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 0243d37..4b3a9e2 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -555,23 +555,22 @@ 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;
}
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [patch] ACPI / sysfs: fix error code in get_status()
2016-05-05 13:23 ` Dan Carpenter
@ 2016-05-05 13:57 ` Rafael J. Wysocki
-1 siblings, 0 replies; 4+ messages in thread
From: Rafael J. Wysocki @ 2016-05-05 13:57 UTC (permalink / raw)
To: Dan Carpenter
Cc: Zhang Rui, Len Brown, linux-acpi, linux-kernel, kernel-janitors
On Thursday, May 05, 2016 04:23:04 PM Dan Carpenter wrote:
> 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@oracle.com>
Good catch!
> diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
> index 0243d37..4b3a9e2 100644
> --- a/drivers/acpi/sysfs.c
> +++ b/drivers/acpi/sysfs.c
> @@ -555,23 +555,22 @@ 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;
> }
Applied, thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [patch] ACPI / sysfs: fix error code in get_status()
@ 2016-05-05 13:57 ` Rafael J. Wysocki
0 siblings, 0 replies; 4+ messages in thread
From: Rafael J. Wysocki @ 2016-05-05 13:57 UTC (permalink / raw)
To: Dan Carpenter
Cc: Zhang Rui, Len Brown, linux-acpi, linux-kernel, kernel-janitors
On Thursday, May 05, 2016 04:23:04 PM Dan Carpenter wrote:
> 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@oracle.com>
Good catch!
> diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
> index 0243d37..4b3a9e2 100644
> --- a/drivers/acpi/sysfs.c
> +++ b/drivers/acpi/sysfs.c
> @@ -555,23 +555,22 @@ 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;
> }
Applied, thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2016-05-05 13:57 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2016-05-05 13:23 [patch] ACPI / sysfs: fix error code in get_status() Dan Carpenter
2016-05-05 13:23 ` Dan Carpenter
2016-05-05 13:57 ` Rafael J. Wysocki
2016-05-05 13:57 ` Rafael J. Wysocki
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