| Message ID | 20210107132838.396641-4-djrscally@gmail.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | Add functionality to ipu3-cio2 driver allowing software_node connections to sensors on platforms designed for Windows | expand |
On Thu, Jan 07, 2021 at 01:28:26PM +0000, Daniel Scally wrote: > Some types of fwnode_handle do not implement the device_is_available() > check, such as those created by software_nodes. There isn't really a > meaningful way to check for the availability of a device that doesn't > actually exist, so if the check isn't implemented just assume that the > "device" is present. > > Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> > Signed-off-by: Daniel Scally <djrscally@gmail.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > Changes in v5: > > - Changed the commit subject > > drivers/base/property.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/base/property.c b/drivers/base/property.c > index 35b95c6ac0c6..0bf5260f14c6 100644 > --- a/drivers/base/property.c > +++ b/drivers/base/property.c > @@ -837,9 +837,15 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put); > /** > * fwnode_device_is_available - check if a device is available for use > * @fwnode: Pointer to the fwnode of the device. > + * > + * For fwnode node types that don't implement the .device_is_available() > + * operation, this function returns true. > */ > bool fwnode_device_is_available(const struct fwnode_handle *fwnode) > { > + if (!fwnode_has_op(fwnode, device_is_available)) > + return true; > + > return fwnode_call_bool_op(fwnode, device_is_available); > } > EXPORT_SYMBOL_GPL(fwnode_device_is_available); > -- > 2.25.1 thanks,
On Thu, Jan 07, 2021 at 01:28:26PM +0000, Daniel Scally wrote: > Some types of fwnode_handle do not implement the device_is_available() > check, such as those created by software_nodes. There isn't really a > meaningful way to check for the availability of a device that doesn't > actually exist, so if the check isn't implemented just assume that the > "device" is present. > > Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> > Signed-off-by: Daniel Scally <djrscally@gmail.com> > --- > Changes in v5: > > - Changed the commit subject > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/base/property.c b/drivers/base/property.c index 35b95c6ac0c6..0bf5260f14c6 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -837,9 +837,15 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put); /** * fwnode_device_is_available - check if a device is available for use * @fwnode: Pointer to the fwnode of the device. + * + * For fwnode node types that don't implement the .device_is_available() + * operation, this function returns true. */ bool fwnode_device_is_available(const struct fwnode_handle *fwnode) { + if (!fwnode_has_op(fwnode, device_is_available)) + return true; + return fwnode_call_bool_op(fwnode, device_is_available); } EXPORT_SYMBOL_GPL(fwnode_device_is_available);