2ef587a8fc
kernel lock debugging unveiled that we should not call of_reset_control_get inside a clock's enable operation (see below) move of_reset_control_* previously used in pllb_clk_enable to new pllb_clk_prepare and pllb_clk_unprepare functions. use a container to carry runtime information. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:2742 lockdep_trace_alloc+0xb8/0xfc() DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags)) Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.26 #6 [<c001a6ac>] (unwind_backtrace) from [<c0016dec>] (show_stack+0x10/0x14) [<c0016dec>] (show_stack) from [<c0194f68>] (dump_stack+0x7c/0x94) [<c0194f68>] (dump_stack) from [<c0021b50>] (warn_slowpath_common+0x68/0x8c) [<c0021b50>] (warn_slowpath_common) from [<c0021ba4>] (warn_slowpath_fmt+0x30/0x40) [<c0021ba4>] (warn_slowpath_fmt) from [<c0061b30>] (lockdep_trace_alloc+0xb8/0xfc) [<c0061b30>] (lockdep_trace_alloc) from [<c00cb740>] (kmem_cache_alloc+0x1c/0xf8) [<c00cb740>] (kmem_cache_alloc) from [<c01d33c8>] (of_reset_control_get+0xe8/0x12c) [<c01d33c8>] (of_reset_control_get) from [<c0269228>] (pllb_clk_enable+0x14/0xbc) [<c0269228>] (pllb_clk_enable) from [<c0265738>] (__clk_enable+0x54/0xa0) [<c0265738>] (__clk_enable) from [<c0265acc>] (clk_enable+0x18/0x2c) [<c0265acc>] (clk_enable) from [<c04325f8>] (oxnas_pcie_probe+0x3b8/0x6a0) [<c04325f8>] (oxnas_pcie_probe) from [<c01f2510>] (platform_drv_probe+0x18/0x48) [<c01f2510>] (platform_drv_probe) from [<c01f1070>] (driver_probe_device+0xd8/0x24c) [<c01f1070>] (driver_probe_device) from [<c01f1298>] (__driver_attach+0x70/0x94) [<c01f1298>] (__driver_attach) from [<c01ef728>] (bus_for_each_dev+0x4c/0x98) [<c01ef728>] (bus_for_each_dev) from [<c01f0818>] (bus_add_driver+0xcc/0x1e8) [<c01f0818>] (bus_add_driver) from [<c01f169c>] (driver_register+0xa0/0xe8) [<c01f169c>] (driver_register) from [<c01f2568>] (platform_driver_probe+0x20/0xa4) [<c01f2568>] (platform_driver_probe) from [<c0013a3c>] (do_one_initcall+0x90/0x140) [<c0013a3c>] (do_one_initcall) from [<c0421d38>] (kernel_init_freeable+0x1e4/0x2c0) [<c0421d38>] (kernel_init_freeable) from [<c000c214>] (kernel_init+0x8/0x104) [<c000c214>] (kernel_init) from [<c0008768>] (ret_from_fork+0x14/0x2c) ---[ end trace 5f17ed2f61e0683f ]--- Signed-off-by: Daniel Golle <daniel@makrotopia.org> SVN-Revision: 43787 |
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