[PATCH v10 01/19] dmaengine: ti: k3-udma: Fix sporadic crash on AM62x

[Vignesh Raghavendra]

> ring_init_data is declared on stack and thus can contain garbage which
> can lead to k3_ringacc_dmarings use junk address for ringrt base leading
> to below crash during ring pop
> 
> [    1.998239] cadence-qspi fc40000.spi: couldn't determine phase-detect-selector
> [    2.532106] Unable to handle kernel paging request at virtual address ffff800081a84b98
> [    2.540051] Mem abort info:
> [...]
> [    2.629987] Workqueue: events_unbound deferred_probe_work_func
> [    2.635832] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [    2.642787] pc : k3_ringacc_ring_pop+0x48/0x94
> [    2.647234] lr : udma_pop_from_ring+0x7c/0xb4
> [...]
> [    2.726250] Call trace:
> [    2.728691]  k3_ringacc_ring_pop+0x48/0x94
> [    2.732786]  udma_ring_irq_handler+0x34/0x218
> [    2.737141]  __handle_irq_event_percpu+0x60/0x14c
> [    2.741846]  handle_irq_event+0x4c/0xa8
> 
> Fix this by explicitly initializing the variable to 0.
> 
> Fixes: 017794739702 ("dmaengine: ti: k3-udma: Initial support for K3 BCDMA")
> Signed-off-by: Vignesh Raghavendra <vigneshr at ti.com>
>

Please add your Signed-off-by as well

-- 
Vignesh