On Sun, Oct 06, 2013 at 08:38:56PM +0200, Jean-Christophe PLAGNIOL-VILLARD
wrote:
> On 13:24 Sun 06 Oct , Sascha Hauer wrote:
> > On Thu, Oct 03, 2013 at 09:21:54AM +0200, Jean-Christophe PLAGNIOL-VILLARD
> > wrote:
> > > rename it to console_get_by_name
> > >
> > > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagn...@jcrosoft.com>
> > > ---
> > > +struct console_device *console_get_by_name(const char *cname)
> > > +{
> > > + struct console_device *cdev;
> > > + const char *target;
> > > +
> > > + for_each_console(cdev) {
> > > + target = dev_id(&cdev->class_dev);
> > > + if (strcmp(cname, target))
> > > + continue;
> > > + if ((cdev->f_active & (CONSOLE_STDIN | CONSOLE_STDOUT))
> > > + return cdev;
> > > + return NULL;
> > > + }
> > > + return NULL;
> > > +}
> > > +EXPORT_SYMBOL(console_get_by_name);
> >
> > I think this function should return the console regardless of whether
> > it's active or not. This makes the console_get_by_name_flags you
> > introduce later unnecessary. Also the loadxyz code shouldn't care if
> > it's activated but instead just activate the console if necessary.
>
> agreed that's why I change this in patch 5
> as now the loadxyz just check if the cdev support input and output
> and not if active or not
Ok, I somewhat misread the patch. I still think though that a function
struct console_device *console_get_by_name(const char *cname, int flags);
is a bit unclear. This function should either return the cdev by name
*or* check the flags, but not both,
The loadxy code now ends up with:
if (cname)
cdev = console_get_by_name(cname, CONSOLE_STDIN &
CONSOLE_STDOUT);
else
cdev = console_get_first_active();
So if cname is given you explicitly ask for a console capable of input
*and* output. If not, you ask for the first actve console, that is the
first console which has input *or* output activated.
The loadxy code should rather look like:
if (cname)
cdev = console_get_by_name(cname);
else
cdev = console_get_first_active();
if (!cdev)
barf_and_bail_out;
if (!console_can_do_input(cdev) || !console_can_do_output())
barf_and_bail_out;
Sascha
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