B5G_UE

linux系统崩溃，从系统日志上看，启动过程中协议栈发生了异常退出，然后系统崩溃。 建议回退协议栈，phy版本看看。
[ 568.607382] stc_read: size: 2
[ 569.607380] stc_read: size: 2
[ 570.607379] stc_read: size: 2
[ 571.607379] stc_read: size: 2
[ 572.607378] stc_read: size: 2
[ 572.891044] exe:stc_read error, ret: 512!
[ 572.950336] [stc_release]realease
[ 914.292498] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G S O 5.10.165-v8 #8
[ 914.300204] Hardware name: smartlogic,ucp2 (DT)
[ 914.304709] Call trace:
[ 914.307150] dump_backtrace+0x0/0x208
[ 914.310793] show_stack+0x14/0x28
[ 914.314089] dump_stack+0xd8/0x10c
[ 914.317473] __arm_smmu_tlb_sync+0x120/0x158
[ 914.321720] arm_smmu_tlb_sync_context+0x84/0xb0
[ 914.326311] arm_smmu_iotlb_sync+0x4c/0x118
[ 914.330471] __iommu_dma_unmap+0xe0/0x100
[ 914.334459] iommu_dma_unmap_page+0x78/0x88
[ 914.338621] dma_unmap_page_attrs+0x2c/0x210
[ 914.342869] stmmac_napi_poll_tx+0x1d0/0x718
[ 914.347116] net_rx_action+0x19c/0x440
[ 914.350844] _stext+0x10c/0x254
[ 914.353968] irq_exit+0x118/0x120
[ 914.357266] __handle_domain_irq+0x60/0xb0
[ 914.361340] gic_handle_irq+0x8c/0x170
[ 914.365067] el1_irq+0xc8/0x180
[ 914.368191] arch_cpu_idle+0x14/0x20
[ 914.371747] default_idle_call+0x20/0x5c
[ 914.375649] do_idle+0x1f8/0x298
[ 914.378859] cpu_startup_entry+0x20/0x58
[ 914.382760] rest_init+0xb8/0xc8
[ 914.385971] arch_call_rest_init+0xc/0x14
[ 914.389958] start_kernel+0x444/0x478
[ 914.393601] arm-smmu 42b8000.iommu: TLB sync timed out - SMMU may be deadlocked
[ 915.449583] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G S O 5.10.165-v8 #8
[ 915.457284] Hardware name: smartlogic,ucp2 (DT)
[ 915.461788] Call trace:
[ 915.464220] dump_backtrace+0x0/0x208
[ 915.467862] show_stack+0x14/0x28
[ 915.471158] dump_stack+0xd8/0x10c
[ 915.474540] __arm_smmu_tlb_sync+0x120/0x158
[ 915.478786] arm_smmu_tlb_sync_context+0x84/0xb0
[ 915.483378] arm_smmu_iotlb_sync+0x4c/0x118
[ 915.487539] __iommu_dma_unmap+0xe0/0x100
[ 915.491526] iommu_dma_unmap_page+0x78/0x88
[ 915.495685] dma_unmap_page_attrs+0x2c/0x210
[ 915.499933] stmmac_napi_poll_tx+0x1d0/0x718
[ 915.504180] net_rx_action+0x19c/0x440
[ 915.507908] _stext+0x10c/0x254
[ 915.511031] irq_exit+0x118/0x120
[ 915.514327] __handle_domain_irq+0x60/0xb0
[ 915.518401] gic_handle_irq+0x8c/0x170
[ 915.522129] el1_irq+0xc8/0x180
[ 915.525253] arch_cpu_idle+0x14/0x20
[ 915.528808] default_idle_call+0x20/0x5c
[ 915.532708] do_idle+0x1f8/0x298
[ 915.535917] cpu_startup_entry+0x20/0x58
[ 915.539818] rest_init+0xb8/0xc8
[ 915.543027] arch_call_rest_init+0xc/0x14
[ 915.547014] start_kernel+0x444/0x478
[ 915.550656] arm-smmu 42b8000.iommu: TLB sync timed out -- SMMU may be deadlocked
[ 916.606618] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G S O 5.10.165-v8 #8
[ 916.614320] Hardware name: smartlogic,ucp2 (DT)
[ 916.618824] Call trace:
[ 916.621257] dump_backtrace+0x0/0x208
[ 916.624898] show_stack+0x14/0x28
[ 916.628194] dump_stack+0xd8/0x10c
[ 916.631576] __arm_smmu_tlb_sync+0x120/0x158
[ 916.635822] arm_smmu_tlb_sync_context+0x84/0xb0
[ 916.640413] arm_smmu_iotlb_sync+0x4c/0x118
[ 916.644574] __iommu_dma_unmap+0xe0/0x100
[ 916.648562] iommu_dma_unmap_page+0x78/0x88
[ 916.652722] dma_unmap_page_attrs+0x2c/0x210
[ 916.656968] stmmac_napi_poll_tx+0x1d0/0x718
[ 916.661215] net_rx_action+0x19c/0x440
[ 916.664943] _stext+0x10c/0x254
[ 916.668065] irq_exit+0x118/0x120
[ 916.671361] __handle_domain_irq+0x60/0xb0
[ 916.675434] gic_handle_irq+0x8c/0x170
[ 916.679162] el1_irq+0xc8/0x180
[ 916.682285] arch_cpu_idle+0x14/0x20
[ 916.685841] default_idle_call+0x20/0x5c
[ 916.689741] do_idle+0x1f8/0x298
[ 916.692951] cpu_startup_entry+0x20/0x58
[ 916.696851] rest_init+0xb8/0xc8
[ 916.700061] arch_call_rest_init+0xc/0x14
[ 916.704048] start_kernel+0x444/0x478
[ 916.707689] arm-smmu 42b8000.iommu: TLB sync timed out -- SMMU may be deadlocked
[ 917.763650] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G S O 5.10.165-v8 #8
[ 917.771351] Hardware name: smartlogic,ucp2 (DT)
[ 917.775855] Call trace:
[ 917.778287] dump_backtrace+0x0/0x208
[ 917.781929] show_stack+0x14/0x28
[ 917.785224] dump_stack+0xd8/0x10c
[ 917.788606] __arm_smmu_tlb_sync+0x120/0x158
[ 917.792852] arm_smmu_tlb_sync_context+0x84/0xb0
[ 917.797443] arm_smmu_iotlb_sync+0x4c/0x118
[ 917.801604] __iommu_dma_unmap+0xe0/0x100
[ 917.805591] iommu_dma_unmap_page+0x78/0x88
[ 917.809751] dma_unmap_page_attrs+0x2c/0x210
[ 917.813997] stmmac_napi_poll_tx+0x1d0/0x718
[ 917.818244] net_rx_action+0x19c/0x440
[ 917.821971] _stext+0x10c/0x254
[ 917.825095] irq_exit+0x118/0x120
[ 917.828390] __handle_domain_irq+0x60/0xb0
[ 917.832464] gic_handle_irq+0x8c/0x170
[ 917.836191] el1_irq+0xc8/0x180
[ 917.839314] arch_cpu_idle+0x14/0x20
[ 917.842870] default_idle_call+0x20/0x5c
[ 917.846771] do_idle+0x1f8/0x298
[ 917.849980] cpu_startup_entry+0x20/0x58
[ 917.853882] rest_init+0xb8/0xc8
[ 917.857091] arch_call_rest_init+0xc/0x14
[ 917.861078] start_kernel+0x444/0x478
[ 917.864719] arm-smmu 42b8000.iommu: TLB sync timed out -- SMMU may be deadlocked