Hi Johan,
Johan Hovold 於 2018/1/10 下午 04:49 寫道:
Normally, the communication with F81534 ep0 will take less than 1 sec
(even only some milliseconds), but It maybe take much long time with
huge loading with UART functional.
We had tested it on BurnInTest, 4 ports with 921600bps + MSR status
check to perform huge loading test. The worst case to read MSR register
via ep0 will take 15~18 seconds. So We'll still remain the max waiting
time for access ep0 with 2x10=20s in high baud rate mode.
Wow, that's unfortunate. But note that your patch only doubles the
timeout to 2000 ms, that is, two seconds and not twenty:
-#define F81534_USB_TIMEOUT 1000
+#define F81534_USB_TIMEOUT 2000
If you really intended to increase this to twenty seconds, then please
do so in a separate (preparatory) patch where you describe why that is
needed (e.g. what you wrote above).
In f81534_set_register()/f81534_get_register(), We'll use a while loop
with 10 times to get/set register and the timeout is 1000ms. So the
total minimum retry timeout is 1000x10=10s.
But when introducing the high baud rate support, 10s is not enough for
heavily loading. We had tested the minimum retry is 16~18s, so we
enlarge the F81534_USB_TIMEOUT from 1000 to 2000 and the total minimum
retry timeout is 20s.
Should I separate it as 2 patches? This issue is due to introducing
high baud patch.
Thanks
--
With Best Regards,
Peter Hong
