On Tuesday, December 16, 2014 06:12:30 PM Octavian Purdila wrote:
> acpi_tb_delete_namespace_by_owner expects ACPI_MTX_INTERPRETER to be
> taken. This fixes the following issue:
>
> ACPI Error: Mutex [0x0] is not acquired, cannot release (20141107/utmutex-322)
> Call Trace:
> [<ffffffff81b0bd28>] dump_stack+0x4f/0x7b
> [<ffffffff81546bfc>] acpi_ut_release_mutex+0x47/0x67
> [<ffffffff81542cf1>] acpi_tb_delete_namespace_by_owner+0x57/0x8d
> [<ffffffff81543ef1>] acpi_unload_table_id+0x3a/0x5e
>
> Signed-off-by: Octavian Purdila <[email protected]>
I've queued up this one for 3.20.
> ---
> drivers/acpi/acpica/tbxface.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
> index 6482b0d..9520ae1 100644
> --- a/drivers/acpi/acpica/tbxface.c
> +++ b/drivers/acpi/acpica/tbxface.c
> @@ -281,6 +281,11 @@ acpi_status acpi_unload_table_id(acpi_owner_id id)
>
> ACPI_FUNCTION_TRACE(acpi_unload_table_id);
>
> + status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
> + if (ACPI_FAILURE(status)) {
> + return_ACPI_STATUS(status);
> + }
> +
> /* Find table in the global table list */
> for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
> if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
> @@ -297,6 +302,8 @@ acpi_status acpi_unload_table_id(acpi_owner_id id)
> acpi_tb_set_table_loaded_flag(i, FALSE);
> break;
> }
> +
> + (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
> return_ACPI_STATUS(status);
> }
>
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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