6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
commit 9d23e48654620fdccfcc74cc2cef04eaf7353d07 upstream.
In some cases, rk_hdptx_phy_runtime_resume() may be invoked before
platform_set_drvdata() is executed in ->probe(), leading to a NULL
pointer dereference when using the return of dev_get_drvdata().
Ensure platform_set_drvdata() is called before devm_pm_runtime_enable().
Reported-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Fixes: 553be2830c5f ("phy: rockchip: Add Samsung HDMI/eDP Combo PHY driver")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx>
Link: https://lore.kernel.org/r/20241023-phy-sam-hdptx-rpm-fix-v1-1-87f4c994e346@xxxxxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
+++ b/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
@@ -1116,6 +1116,8 @@ static int rk_hdptx_phy_probe(struct pla
return dev_err_probe(dev, PTR_ERR(hdptx->grf),
"Could not get GRF syscon\n");
+ platform_set_drvdata(pdev, hdptx);
+
ret = devm_pm_runtime_enable(dev);
if (ret)
return dev_err_probe(dev, ret, "Failed to enable runtime PM\n");
@@ -1125,7 +1127,6 @@ static int rk_hdptx_phy_probe(struct pla
return dev_err_probe(dev, PTR_ERR(hdptx->phy),
"Failed to create HDMI PHY\n");
- platform_set_drvdata(pdev, hdptx);
phy_set_drvdata(hdptx->phy, hdptx);
phy_set_bus_width(hdptx->phy, 8);
