Loop play a video AVC_1080p_24fps_90Mbps_bird90.m2ts met UI
freeze and "rcu stall". Enable CONFIG_DEBUG_SPINLOCK kernel
debug get below call stack, the reason is due to spin_lock
be used in IRQ interrupt and caused deadlock.
8mq board enabled Video overlay feature, there are two fences
enabled: out fence (represent frame on screen) and android out
fence (new added, represent frame off screen). When there are
two fences sync_file_set_fence() will call dma_fence_array_create()
to register irq_dma_fence_array_work(), then gckOS_DestroySignal()
will be called in IRQ which use spin_lock cause deadlock.
Fix solution is use spin_lock_irqsave() instead of spin_lock()
for Database->lock if it is not called in IRQ interrupt.
Call stack:
[ 608.902810] dump_backtrace.cfi_jt+0x0/0x4
[ 608.906914] show_stack+0x18/0x24
[ 608.910237] dump_stack+0xb8/0x114
[ 608.913644] spin_bug+0xb0/0xb4
[ 608.916788] do_raw_spin_lock+0xac/0x124
[ 608.920714] _raw_spin_lock+0x20/0x2c
[ 608.924384] gckOS_DestroySignal+0x6c/0x170
[ 608.928572] viv_fence_release+0x28/0x40
[ 608.932502] dma_fence_release+0x13c/0x280
[ 608.936603] dma_fence_array_release+0x74/0x98
[ 608.941049] dma_fence_release+0x13c/0x280
[ 608.945150] irq_dma_fence_array_work+0x6c/0x9c
[ 608.949690] irq_work_run_list+0xb4/0x148
[ 608.953702] irq_work_run+0x20/0x40
[ 608.957193] handle_IPI+0x10c/0x180
[ 608.960686] efi_header_end+0x13c/0x15c
[ 608.964526] el1_irq+0x104/0x200
[ 608.967761] radix_tree_lookup+0x38/0x84
[ 608.971686] gckOS_WaitSignal+0x54/0x258
[ 608.975615] gckKERNEL_Dispatch+0x1460/0x1754
[ 608.979977] gckDEVICE_Dispatch+0x1a0/0x1a4
[ 608.984165] drv_ioctl+0xb8/0x184
[ 608.987487] do_vfs_ioctl+0x3a0/0x6f0
[ 608.991154] __arm64_sys_ioctl+0x78/0xa4
[ 608.995082] el0_svc_common+0xb4/0x18c
[ 608.998834] el0_svc_handler+0x74/0x98
[ 609.002589] el0_svc+0x8/0xc
Change-Id: Idf16a5707add70246c74d2f1446f7dbb7037f5f0
Signed-off-by: Haoran.Wang <elven.wang@nxp.com>
Signed-off-by: Richard Liu <xuegang.liu@nxp.com>
(cherry picked from commit b6106c5de2529b01ce5bb3380fd93328b55d5528)
add79449db