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Device properties framework fixes for 5.11-rc3

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Revert a problematic commit that went in during the 5.10 cycle and
 improve the kerneldoc description of the function affected by it (both
 changes from Bard Liao).
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Merge tag 'devprop-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework fixes from Rafael Wysocki:
 "Revert a problematic commit that went in during the 5.10 cycle and
  improve the kerneldoc description of the function affected by it (both
  changes from Bard Liao)"

* tag 'devprop-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: add description of fwnode cases
  Revert "device property: Keep secondary firmware node secondary by type"
This commit is contained in:
Linus Torvalds 2021-01-08 15:45:47 -08:00
commit 78d42025e5
1 changed files with 8 additions and 1 deletions
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9
drivers/base/core.c
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@ -4414,6 +4414,12 @@ static inline bool fwnode_is_primary(struct fwnode_handle *fwnode)
*
* Set the device's firmware node pointer to @fwnode, but if a secondary
* firmware node of the device is present, preserve it.
*
* Valid fwnode cases are:
* - primary --> secondary --> -ENODEV
* - primary --> NULL
* - secondary --> -ENODEV
* - NULL
*/
void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
{
@ -4432,8 +4438,9 @@ void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
} else {
if (fwnode_is_primary(fn)) {
dev->fwnode = fn->secondary;
/* Set fn->secondary = NULL, so fn remains the primary fwnode */
if (!(parent && fn == parent->fwnode))
fn->secondary = ERR_PTR(-ENODEV);
fn->secondary = NULL;
} else {
dev->fwnode = NULL;
}