On Thu, Jan 06, 2022 at 05:06:31PM +0800, Jiasheng Jiang wrote: > As the possible failure of the allocation, the devm_ioremap() may return > NULL pointer. I do not understand this sentence. > And the 'port->membase' will be directly used in mlb_usio_startup(). This does not make sense either. > Therefore, in order to avoid the dereference of the NULL pointer, it > should be better to add the sanity check. What do you mean by "sanity check"? confused, greg k-h
