On Thu, Jan 7, 2021 at 5:53 AM haidong yao <yaohaidong...@gmail.com> wrote: > > Hi Jassi Brar > > Thank you very much for your reply. > > Look at the function sprd_mbox_outbox_isr . > > Chan is !NULL. > > chan->cl is NULL when the client driver not loaded, the controller > driver don't know the client driver loaded successfully, so, I do not > use mbox_free_channel. > > Here,How do you know chan->cl is ok? > The channel is supposed to get/send data _only_ if it is being used by a client. Which you can mark in .startup() and .shutdown().
Checking for chan->cl will make your symptoms disappear but that is not the right fix for the issue. The right fix is to EITHER not cause Rx/Tx interrupt on a channel not being used, OR not send it to upper layers. thanks.
