* [PATCH] PM/sleep: fix return value of __setup handler
@ 2022-02-28 22:05 Randy Dunlap
2022-03-01 17:56 ` Rafael J. Wysocki
0 siblings, 1 reply; 2+ messages in thread
From: Randy Dunlap @ 2022-02-28 22:05 UTC (permalink / raw)
To: linux-kernel
Cc: Randy Dunlap, Igor Zhbanov, Srinivas Pandruvada,
Rafael J. Wysocki, Len Brown, Pavel Machek, linux-pm
If an invalid option is given for "test_suspend=<option>", the entire
string is added to init's environment, so return 1 instead of 0 from
the __setup handler.
Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc5
test_suspend=invalid"
and
Run /sbin/init as init process
with arguments:
/sbin/init
with environment:
HOME=/
TERM=linux
BOOT_IMAGE=/boot/bzImage-517rc5
test_suspend=invalid
Fixes: 2ce986892faf ("PM / sleep: Enhance test_suspend option with repeat capability")
Fixes: 27ddcc6596e5 ("PM / sleep: Add state field to pm_states[] entries")
Fixes: a9d7052363a6 ("PM: Separate suspend to RAM functionality from core")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: linux-pm@vger.kernel.org
---
Would someone like warning messages added in case of bad option strings?
kernel/power/suspend_test.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- linux-next-20220228.orig/kernel/power/suspend_test.c
+++ linux-next-20220228/kernel/power/suspend_test.c
@@ -157,22 +157,22 @@ static int __init setup_test_suspend(cha
value++;
suspend_type = strsep(&value, ",");
if (!suspend_type)
- return 0;
+ return 1;
repeat = strsep(&value, ",");
if (repeat) {
if (kstrtou32(repeat, 0, &test_repeat_count_max))
- return 0;
+ return 1;
}
for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)
if (!strcmp(pm_labels[i], suspend_type)) {
test_state_label = pm_labels[i];
- return 0;
+ return 1;
}
printk(warn_bad_state, suspend_type);
- return 0;
+ return 1;
}
__setup("test_suspend", setup_test_suspend);
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] PM/sleep: fix return value of __setup handler
2022-02-28 22:05 [PATCH] PM/sleep: fix return value of __setup handler Randy Dunlap
@ 2022-03-01 17:56 ` Rafael J. Wysocki
0 siblings, 0 replies; 2+ messages in thread
From: Rafael J. Wysocki @ 2022-03-01 17:56 UTC (permalink / raw)
To: Randy Dunlap
Cc: Linux Kernel Mailing List, Igor Zhbanov, Srinivas Pandruvada,
Rafael J. Wysocki, Len Brown, Pavel Machek, Linux PM
On Mon, Feb 28, 2022 at 11:05 PM Randy Dunlap <rdunlap@infradead.org> wrote:
>
> If an invalid option is given for "test_suspend=<option>", the entire
> string is added to init's environment, so return 1 instead of 0 from
> the __setup handler.
>
> Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc5
> test_suspend=invalid"
>
> and
>
> Run /sbin/init as init process
> with arguments:
> /sbin/init
> with environment:
> HOME=/
> TERM=linux
> BOOT_IMAGE=/boot/bzImage-517rc5
> test_suspend=invalid
>
> Fixes: 2ce986892faf ("PM / sleep: Enhance test_suspend option with repeat capability")
> Fixes: 27ddcc6596e5 ("PM / sleep: Add state field to pm_states[] entries")
> Fixes: a9d7052363a6 ("PM: Separate suspend to RAM functionality from core")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
> Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
> Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
> Cc: "Rafael J. Wysocki" <rafael@kernel.org>
> Cc: Len Brown <len.brown@intel.com>
> Cc: Pavel Machek <pavel@ucw.cz>
> Cc: linux-pm@vger.kernel.org
> ---
> Would someone like warning messages added in case of bad option strings?
>
> kernel/power/suspend_test.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> --- linux-next-20220228.orig/kernel/power/suspend_test.c
> +++ linux-next-20220228/kernel/power/suspend_test.c
> @@ -157,22 +157,22 @@ static int __init setup_test_suspend(cha
> value++;
> suspend_type = strsep(&value, ",");
> if (!suspend_type)
> - return 0;
> + return 1;
>
> repeat = strsep(&value, ",");
> if (repeat) {
> if (kstrtou32(repeat, 0, &test_repeat_count_max))
> - return 0;
> + return 1;
> }
>
> for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)
> if (!strcmp(pm_labels[i], suspend_type)) {
> test_state_label = pm_labels[i];
> - return 0;
> + return 1;
> }
>
> printk(warn_bad_state, suspend_type);
> - return 0;
> + return 1;
> }
> __setup("test_suspend", setup_test_suspend);
Applied as 5.18 material, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-02-28 22:05 [PATCH] PM/sleep: fix return value of __setup handler Randy Dunlap
2022-03-01 17:56 ` Rafael J. Wysocki
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