linux-kernel - [PATCH v2] staging: greybus: gbphy: fix up const issue with the match callback

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Message-ID: <2025070115-reoccupy-showy-e2ad@gregkh>
Date: Tue,  1 Jul 2025 13:06:16 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johan Hovold <johan@...nel.org>,
	Alex Elder <elder@...nel.org>,
	greybus-dev@...ts.linaro.org
Subject: [PATCH v2] staging: greybus: gbphy: fix up const issue with the match callback

gbphy_dev_match_id() should be taking a const pointer, as the pointer
passed to it from the container_of() call was const to start with (it
was accidentally cast away with the call.)  Fix this all up by correctly
marking the pointer types.

Cc: Johan Hovold <johan@...nel.org>
Cc: Alex Elder <elder@...nel.org>
Cc: greybus-dev@...ts.linaro.org
Fixes: d69d80484598 ("driver core: have match() callback in struct bus_type take a const *")
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
v2: - add Fixes: line as pointed out by Johan
    - don't make gbphy_dev const, it's not needed, as pointed out by
      Johan

 drivers/staging/greybus/gbphy.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/greybus/gbphy.c b/drivers/staging/greybus/gbphy.c
index 6adcad286633..60cf09a302a7 100644
--- a/drivers/staging/greybus/gbphy.c
+++ b/drivers/staging/greybus/gbphy.c
@@ -102,8 +102,8 @@ static int gbphy_dev_uevent(const struct device *dev, struct kobj_uevent_env *en
 }
 
 static const struct gbphy_device_id *
-gbphy_dev_match_id(struct gbphy_device *gbphy_dev,
-		   struct gbphy_driver *gbphy_drv)
+gbphy_dev_match_id(const struct gbphy_device *gbphy_dev,
+		   const struct gbphy_driver *gbphy_drv)
 {
 	const struct gbphy_device_id *id = gbphy_drv->id_table;
 
@@ -119,7 +119,7 @@ gbphy_dev_match_id(struct gbphy_device *gbphy_dev,
 
 static int gbphy_dev_match(struct device *dev, const struct device_driver *drv)
 {
-	struct gbphy_driver *gbphy_drv = to_gbphy_driver(drv);
+	const struct gbphy_driver *gbphy_drv = to_gbphy_driver(drv);
 	struct gbphy_device *gbphy_dev = to_gbphy_dev(dev);
 	const struct gbphy_device_id *id;
 
-- 
2.50.0