Messages in this thread Patch in this message | | | Date | Tue, 16 Apr 2024 22:18:31 +0300 | From | Andy Shevchenko <> | Subject | Re: [PATCH v2 2/3] serial: 8250: Store whether fifo device is enabled |
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On Tue, Apr 16, 2024 at 07:09:52PM +0000, Michael Pratt wrote: > On Tuesday, April 16th, 2024 at 14:55, Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:
> > > @@ -3392,6 +3392,8 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s, > > > > > + up->fifo_enable = use_fifo; > > > > This seems incorrect / not the only one place to assign this. What if the > > console not enabled at compile time? What if it's not enabled at boot time? > > This is 8250 specific, and currently, it's the only place there > where it's decided whether or not to use the fifo device > by checking a bunch of flags and values.
Exactly, as initial commit is related to the kernel console _only_. While your code, IIUC (correct me, if I'm wrong) is for any use of the port.
> If you're suggesting that these checks are moved out of this function somewhere else, > I would probably agree with that, but let's save that idea for the future...
Not really (again, IIUC above), as console can be not enabled, and hence serial8250_console_write() never been called and you will have false impression that there is no FIFO in use.
> If you're suggesting that there could be a null pointer, I don't think that's possible > in this function... (the name of the pointer being "up" might be confusing?) > > Sorry if I'm misunderstanding what you mean.
-- With Best Regards, Andy Shevchenko
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