You are too quick with v2, below my comments (new and old).
On Tue, Nov 14, 2023 at 01:53:51AM +1000, Ronald Monthero wrote:
Under heavy load it is likely that the controller is done with its own task but the thread unlocking the wait is not scheduled in time. Increasing IFC_TIMEOUT_MSECS allows the controller to respond within allowable timeslice of 1 sec
Missing period at the end?
fsl,ifc-nand 7e800000.nand: Controller is not responding
main/smp_fsm.c:1884 <inrcu: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P116/2:b..l (detected by 1, t=2102 jiffies, g=7729, q=754) task:irq/31-arm-irq1 state:D stack: 0 pid: 116 ppid: 2 flags:0x00000000 [<8064b97f>] (__schedule) from [<8064bb01>] (schedule+0x8d/0xc2) [<8064bb01>] (schedule) from [<8064dacd>] [<8064dacd>] (rt_mutex_slowlock_block.constprop.0) from [<8064db57>] [<8064db57>] (__rt_mutex_slowlock.constprop.0) from [<8064dbf7>] [<8064dbf7>] (rt_mutex_slowlock.constprop.0) from [<804b2047>]
At least above 9 lines are not important and may be removed.
[<804b2047>] (nand_get_device) from [<804b5335>] (nand_write_oob+0x1b/0x4a) [<804b5335>] (nand_write_oob) from [<804a3585>] (mtd_write+0x41/0x5c) [<804a3585>] (mtd_write) from [<804c1d47>] (ubi_io_write+0x17f/0x22c) [<804c1d47>] (ubi_io_write) from [<804c047b>] (ubi_eba_write_leb+0x5b/0x1d0)
...
-#define IFC_TIMEOUT_MSECS 500 /* Maximum number of mSecs to wait +#define IFC_TIMEOUT_MSECS 1000 /* Maximum number of mSecs to wait for IFC NAND Machine */
While at it, you may improve the comment, e.g.,
"Maximum timeout to wait for IPC NAND Machine"