MLK-20098-2: imx/drm/dcss: fix uninitialized spinlock
After activating CONFIG_DEBUG_SPINLOCK, the following warning was thrown in kernel log: [ 1.261079] BUG: spinlock bad magic on CPU#0, kworker/0:2/1285 [ 1.266928] lock: 0xffff8000b92f0190, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 [ 1.275113] CPU: 0 PID: 1285 Comm: kworker/0:2 Not tainted 4.14.62-05296-gd695a5b #460 [ 1.283032] Hardware name: Freescale i.MX8MQ EVK (DT) [ 1.288094] Workqueue: pm pm_runtime_work [ 1.292111] Call trace: [ 1.294567] [<ffff00000808a7d0>] dump_backtrace+0x0/0x3d8 [ 1.299974] [<ffff00000808abbc>] show_stack+0x14/0x20 [ 1.305032] [<ffff000008dccd40>] dump_stack+0x8c/0xac [ 1.310091] [<ffff000008119858>] spin_dump+0x70/0x90 [ 1.315060] [<ffff000008119978>] do_raw_spin_lock+0xc0/0x108 [ 1.320726] [<ffff000008de6380>] _raw_spin_lock_irqsave+0x28/0x38 [ 1.326825] [<ffff000008677434>] dcss_ctxld_kick+0x2c/0x200 [ 1.332402] [<ffff000008677a3c>] dcss_ctxld_suspend+0x1c/0xa0 [ 1.338153] [<ffff000008676648>] dcss_runtime_suspend+0x18/0x68 [ 1.344079] [<ffff0000086f3740>] pm_generic_runtime_suspend+0x28/0x40 [ 1.350523] [<ffff0000086f6558>] __rpm_callback+0xe0/0x268 [ 1.356015] [<ffff0000086f6700>] rpm_callback+0x20/0x80 [ 1.361246] [<ffff0000086f56ec>] rpm_suspend+0xf4/0x4b8 [ 1.366474] [<ffff0000086f5cac>] rpm_idle+0x124/0x168 [ 1.371531] [<ffff0000086f70b8>] pm_runtime_work+0xa0/0xb8 [ 1.377025] [<ffff0000080ec874>] process_one_work+0x1d4/0x360 [ 1.382774] [<ffff0000080eca48>] worker_thread+0x48/0x478 [ 1.388180] [<ffff0000080f2e10>] kthread+0x138/0x140 [ 1.393151] [<ffff000008084f48>] ret_from_fork+0x10/0x18 The reason was an uninitialized spinlock. Signed-off-by: Laurentiu Palcu <laurentiu.palcu@nxp.com>pull/10/head
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@ -260,6 +260,8 @@ int dcss_ctxld_init(struct dcss_soc *dcss, unsigned long ctxld_base)
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dcss->ctxld_priv = priv;
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priv->dcss = dcss;
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spin_lock_init(&priv->lock);
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ret = dcss_ctxld_alloc_ctx(priv);
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if (ret) {
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dev_err(dcss->dev, "ctxld: cannot allocate context memory.\n");
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