On Friday, July 02, 2010, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@xxxxxxx>
>
> We only can try to allocate memory for saving the NVS region if it
> is known that the target system sleep state is valid. Otherwise
> we will leak memory if suspend_nvs_alloc() is successful and the
> target state is invalid, because suspend_nvs_free() will not be
> called in that case.
>
> Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Well, the $subject patch doesn't cover a real problem where the suspending
of devices fails (or suspend is tested in the "devices" mode) and
acpi_pm_finish() is not called at all. So, the appended patch should be used
instead.
Rafael
---
From: Rafael J. Wysocki <rjw@xxxxxxx>
Subject: ACPI / Sleep: Free NVS copy if suspending of devices fails
If suspending of devices fails or system suspend is tested in the
"devices" mode, the memory allocated for storing a copy of the ACPI
NVS area will not be freed, because acpi_pm_finish() is not called
in that case. Fix this by moving the suspend_nvs_free() call to
acpi_pm_end().
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
---
drivers/acpi/sleep.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
Index: linux-2.6/drivers/acpi/sleep.c
===================================================================
--- linux-2.6.orig/drivers/acpi/sleep.c
+++ linux-2.6/drivers/acpi/sleep.c
@@ -145,7 +145,6 @@ static void acpi_pm_finish(void)
{
u32 acpi_state = acpi_target_sleep_state;
- suspend_nvs_free();
acpi_ec_unblock_transactions();
if (acpi_state == ACPI_STATE_S0)
@@ -167,6 +166,7 @@ static void acpi_pm_finish(void)
*/
static void acpi_pm_end(void)
{
+ suspend_nvs_free();
/*
* This is necessary in case acpi_pm_finish() is not called during a
* failing transition to a sleep state.
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