[PATCH] phy: realtek: usb: Remove const from phy_cfg allocation type

[Kees Cook <kees@kernel.org>]

From: Kees Cook <kees+treewide@kernel.org>

In preparation for making the devm_kmalloc family of allocators type
aware, we need to make sure that the returned type from the allocation
matches the type of the variable being assigned. (Before, the allocator
would always return "void *", which can be implicitly cast to any
pointer type.)

In both the USB2 and USB3 PHY drivers, the assigned type is
"struct phy_cfg *", but the converted allocation type would be
"const struct phy_cfg *", as the size was taken from the local
"phy_cfg", which points to const as it comes from
of_device_get_match_data(). As there is no general way to remove const
qualifiers, take the size from the assignment target instead. No change
in allocation size results.

Build tested ARCH=x86_64 allmodconfig with GCC 16.2.0:
drivers/phy/realtek/phy-rtk-usb2.o
drivers/phy/realtek/phy-rtk-usb3.o

Assisted-by: LLM coccinelle
Signed-off-by: Kees Cook <kees+treewide@kernel.org>
---
Cc: Vinod Koul <vkoul@kernel.org>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Stanley Chang <stanley_chang@realtek.com>
Cc: Johan Hovold <johan+linaro@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@baylibre.com>
Cc: Jinjie Ruan <ruanjinjie@huawei.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Charles Han <hanchunchao@inspur.com>
Cc: <linux-phy@lists.infradead.org>
---
 drivers/phy/realtek/phy-rtk-usb2.c | 3 ++-
 drivers/phy/realtek/phy-rtk-usb3.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/realtek/phy-rtk-usb2.c b/drivers/phy/realtek/phy-rtk-usb2.c
index 248550ef98ca..1f08b151d90a 100644
--- a/drivers/phy/realtek/phy-rtk-usb2.c
+++ b/drivers/phy/realtek/phy-rtk-usb2.c
@@ -1022,7 +1022,8 @@ static int rtk_usb2phy_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	rtk_phy->dev			= &pdev->dev;
-	rtk_phy->phy_cfg = devm_kzalloc(dev, sizeof(*phy_cfg), GFP_KERNEL);
+	rtk_phy->phy_cfg = devm_kzalloc(dev, sizeof(*rtk_phy->phy_cfg),
+					GFP_KERNEL);
 	if (!rtk_phy->phy_cfg)
 		return -ENOMEM;
 
diff --git a/drivers/phy/realtek/phy-rtk-usb3.c b/drivers/phy/realtek/phy-rtk-usb3.c
index cce453686db2..4231a8aa0ba5 100644
--- a/drivers/phy/realtek/phy-rtk-usb3.c
+++ b/drivers/phy/realtek/phy-rtk-usb3.c
@@ -576,7 +576,8 @@ static int rtk_usb3phy_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	rtk_phy->dev			= &pdev->dev;
-	rtk_phy->phy_cfg = devm_kzalloc(dev, sizeof(*phy_cfg), GFP_KERNEL);
+	rtk_phy->phy_cfg = devm_kzalloc(dev, sizeof(*rtk_phy->phy_cfg),
+					GFP_KERNEL);
 	if (!rtk_phy->phy_cfg)
 		return -ENOMEM;
 
-- 
2.34.1