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driver core: Add a comment to set_primary_fwnode() on nullifying 

Explain what parent && fn == parent->fwnode conditional does.
With this refactor the code a bit.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230323182640.61085-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2023-03-23 20:26:40 +02:00 committed by Greg Kroah-Hartman
parent cf34b880a6
commit 2f9e87f5a2
1 changed files with 6 additions and 2 deletions
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8
drivers/base/core.c
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@ -4982,9 +4982,13 @@ void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
} else {
if (fwnode_is_primary(fn)) {
dev->fwnode = fn->secondary;
/* Skip nullifying fn->secondary if the primary is shared */
if (parent && fn == parent->fwnode)
return;
/* Set fn->secondary = NULL, so fn remains the primary fwnode */
if (!(parent && fn == parent->fwnode))
fn->secondary = NULL;
fn->secondary = NULL;
} else {
dev->fwnode = NULL;
}