msm: mpm-of: fix for "cxo_lpm_clk is unbalanced" slowpath warning.
The variable xo_enabled needs protection. It might get called
simultaneously from suspend and mpm worker thread context.
Added a mutex to prevent this.
WARNING: at kernel/arch/arm/mach-msm/clock.c:411 clk_disable+0xc8/0x150()
cxo_lpm_clk is unbalanced
Modules linked in: adsprpc texfat(PO) mwlan_aarp(PO)
[<c010d24c>] (unwind_backtrace+0x0/0x138) from [<c01a0408>]
(warn_slowpath_common+0x4c/0x64)
[<c01a0408>] (warn_slowpath_common+0x4c/0x64) from [<c01a04b4>]
(warn_slowpath_fmt+0x30/0x40)
[<c01a04b4>] (warn_slowpath_fmt+0x30/0x40) from [<c011a068>]
(clk_disable+0xc8/0x150)
[<c011a068>] (clk_disable+0xc8/0x150) from [<c0180568>]
(msm_mpm_sys_low_power_modes+0x28/0x84)
[<c0180568>] (msm_mpm_sys_low_power_modes+0x28/0x84) from [<c0180768>]
(msm_mpm_work_fn+0x1c/0x5c)
[<c0180768>] (msm_mpm_work_fn+0x1c/0x5c) from [<c01b9568>]
(process_one_work+0x128/0x490)
[<c01b9568>] (process_one_work+0x128/0x490) from [<c01b9c14>]
(worker_thread+0x164/0x35c)
[<c01b9c14>] (worker_thread+0x164/0x35c) from [<c01be9a8>]
(kthread+0x88/0x94)
[<c01be9a8>] (kthread+0x88/0x94) from [<c0107a04>]
(kernel_thread_exit+0x0/0x8)
---[ end trace d18a7d72e45b272f ]---
------------[ cut here ]------------
WARNING: at kernel/arch/arm/mach-msm/clock.c:436 clk_unprepare+0xac/0xd4()
cxo_lpm_clk is unbalanced (prepare)
Modules linked in: adsprpc texfat(PO) mwlan_aarp(PO)
[<c010d24c>] (unwind_backtrace+0x0/0x138) from [<c01a0408>]
(warn_slowpath_common+0x4c/0x64)
[<c01a0408>] (warn_slowpath_common+0x4c/0x64) from [<c01a04b4>]
(warn_slowpath_fmt+0x30/0x40)
[<c01a04b4>] (warn_slowpath_fmt+0x30/0x40) from [<c011aa78>]
(clk_unprepare+0xac/0xd4)
[<c011aa78>] (clk_unprepare+0xac/0xd4) from [<c0180570>]
(msm_mpm_sys_low_power_modes+0x30/0x84)
[<c0180570>] (msm_mpm_sys_low_power_modes+0x30/0x84) from [<c0180768>]
(msm_mpm_work_fn+0x1c/0x5c)
[<c0180768>] (msm_mpm_work_fn+0x1c/0x5c) from [<c01b9568>]
(process_one_work+0x128/0x490)
[<c01b9568>] (process_one_work+0x128/0x490) from [<c01b9c14>]
(worker_thread+0x164/0x35c)
[<c01b9c14>] (worker_thread+0x164/0x35c) from [<c01be9a8>]
(kthread+0x88/0x94)
[<c01be9a8>] (kthread+0x88/0x94) from [<c0107a04>]
(kernel_thread_exit+0x0/0x8)
---[ end trace d18a7d72e45b2730 ]---
CRs-fixed: 596765
Change-Id: Ibe685e8f37eb63c4e9e9d3434719985f33c63376
Signed-off-by: Anil kumar mamidala <amami@codeaurora.org>
1 file changed