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Message-Id: <201101142209.35892.rjw@sisk.pl>
Date: Fri, 14 Jan 2011 22:09:35 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc: Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: BUG: spinlock bad magic on CPU#0
On Friday, January 14, 2011, Sergey Senozhatsky wrote:
> Hello,
Hi,
> Acer Aspire 5741g
> 2.6.37-git11
>
> Got this trace today:
>
> [ 0.814609] ACPI: EC: Look up EC in DSDT
> [ 0.825556] BUG: spinlock bad magic on CPU#0, swapper/1
> [ 0.825639] lock: ffffffff8242fa90, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
> [ 0.825741] Pid: 1, comm: swapper Not tainted 2.6.37-dbg-git11-07456-gdbc61c6-dirty #359
> [ 0.825841] Call Trace:
> [ 0.825923] [<ffffffff81247919>] ? spin_bug+0x9c/0xa3
> [ 0.826004] [<ffffffff812479e9>] ? do_raw_spin_lock+0x29/0x122
> [ 0.826093] [<ffffffff814867e5>] ? _raw_spin_lock_irqsave+0x56/0x60
> [ 0.826181] [<ffffffff81275e8a>] ? acpi_os_acquire_lock+0x9/0xb
> [ 0.826264] [<ffffffff81275e8a>] ? acpi_os_acquire_lock+0x9/0xb
> [ 0.826350] [<ffffffff81288fad>] ? acpi_ev_acquire_global_lock+0x10b/0x206
> [ 0.826438] [<ffffffff8129620c>] ? acpi_ex_acquire_mutex_object+0xa3/0x11d
> [ 0.826525] [<ffffffff812952e3>] ? acpi_ex_acquire_global_lock+0x61/0xa2
> [ 0.826613] [<ffffffff8128def7>] ? acpi_ex_read_data_from_field+0x293/0x2f1
> [ 0.826701] [<ffffffff81296e88>] ? acpi_ex_resolve_node_to_value+0x320/0x444
> [ 0.826789] [<ffffffff812a8587>] ? acpi_ut_trace_ptr+0x58/0x65
> [ 0.826874] [<ffffffff8128efb1>] ? acpi_ex_resolve_to_value+0x379/0x406
> [ 0.826961] [<ffffffff81284efb>] ? acpi_ds_evaluate_name_path+0x9e/0x143
> [ 0.827048] [<ffffffff812824c5>] ? acpi_ds_exec_end_op+0xda/0x641
> [ 0.827131] [<ffffffff812a844c>] ? acpi_ut_status_exit+0x6f/0x80
> [ 0.827216] [<ffffffff812a2e5c>] ? acpi_ps_parse_loop+0xc65/0xf45
> [ 0.827302] [<ffffffff812a1acf>] ? acpi_ps_parse_aml+0x162/0x467
> [ 0.827385] [<ffffffff812a8691>] ? acpi_ut_ptr_exit+0x33/0x3b
> [ 0.827470] [<ffffffff812a3b5a>] ? acpi_ps_execute_method+0x26d/0x393
> [ 0.827558] [<ffffffff8129c14d>] ? acpi_ns_evaluate+0x235/0x3b7
> [ 0.827643] [<ffffffff812ab605>] ? acpi_ut_add_reference+0xb1/0xb8
> [ 0.827730] [<ffffffff8129c42a>] ? acpi_ns_exec_module_code_list+0x15b/0x25d
> [ 0.827818] [<ffffffff812a9dbb>] ? acpi_initialize_objects+0x88/0x17d
> [ 0.827907] [<ffffffff81ad43ff>] ? acpi_init+0x0/0x10a
> [ 0.827990] [<ffffffff81ad42c1>] ? acpi_bus_init+0x9f/0x1dd
> [ 0.828076] [<ffffffff8123c24b>] ? kobject_create_and_add+0x37/0x68
> [ 0.828162] [<ffffffff81ad4470>] ? acpi_init+0x71/0x10a
> [ 0.828248] [<ffffffff810002ee>] ? do_one_initcall+0x7a/0x13c
> [ 0.828334] [<ffffffff81aacda0>] ? kernel_init+0x16c/0x1f0
> [ 0.828420] [<ffffffff81002fa4>] ? kernel_thread_helper+0x4/0x10
> [ 0.828506] [<ffffffff81031ab3>] ? finish_task_switch+0x78/0xec
> [ 0.828592] [<ffffffff81487318>] ? restore_args+0x0/0x30
> [ 0.828677] [<ffffffff81aacc34>] ? kernel_init+0x0/0x1f0
> [ 0.828760] [<ffffffff81002fa0>] ? kernel_thread_helper+0x0/0x10
> [ 0.828935] ACPI: Executed 1 blocks of module-level executable AML code
Does the appended patch help?
Rafael
---
drivers/acpi/acpica/acglobal.h | 2 ++
drivers/acpi/acpica/evmisc.c | 2 --
drivers/acpi/acpica/utmutex.c | 1 +
3 files changed, 3 insertions(+), 2 deletions(-)
Index: linux-2.6/drivers/acpi/acpica/acglobal.h
===================================================================
--- linux-2.6.orig/drivers/acpi/acpica/acglobal.h
+++ linux-2.6/drivers/acpi/acpica/acglobal.h
@@ -228,8 +228,10 @@ ACPI_EXTERN u8 acpi_gbl_global_lock_pres
*/
ACPI_EXTERN spinlock_t _acpi_gbl_gpe_lock; /* For GPE data structs and registers */
ACPI_EXTERN spinlock_t _acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */
+ACPI_EXTERN spinlock_t _acpi_ev_global_lock_pending_lock; /* For global lock */
#define acpi_gbl_gpe_lock &_acpi_gbl_gpe_lock
#define acpi_gbl_hardware_lock &_acpi_gbl_hardware_lock
+#define acpi_ev_global_lock_pending_lock &_acpi_ev_global_lock_pending_lock
/*****************************************************************************
*
Index: linux-2.6/drivers/acpi/acpica/evmisc.c
===================================================================
--- linux-2.6.orig/drivers/acpi/acpica/evmisc.c
+++ linux-2.6/drivers/acpi/acpica/evmisc.c
@@ -293,8 +293,6 @@ static void ACPI_SYSTEM_XFACE acpi_ev_no
*
******************************************************************************/
static u8 acpi_ev_global_lock_pending;
-static spinlock_t _acpi_ev_global_lock_pending_lock;
-#define acpi_ev_global_lock_pending_lock &_acpi_ev_global_lock_pending_lock
static u32 acpi_ev_global_lock_handler(void *context)
{
Index: linux-2.6/drivers/acpi/acpica/utmutex.c
===================================================================
--- linux-2.6.orig/drivers/acpi/acpica/utmutex.c
+++ linux-2.6/drivers/acpi/acpica/utmutex.c
@@ -85,6 +85,7 @@ acpi_status acpi_ut_mutex_initialize(voi
spin_lock_init(acpi_gbl_gpe_lock);
spin_lock_init(acpi_gbl_hardware_lock);
+ spin_lock_init(acpi_ev_global_lock_pending_lock);
/* Mutex for _OSI support */
status = acpi_os_create_mutex(&acpi_gbl_osi_mutex);
--
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