提交 d0f347d6 编写于 作者: D David Dueck 提交者: Felipe Balbi

usb: phy: am335x-control: check return value of bus_find_device

This fixes a potential null pointer dereference.

Cc: <stable@vger.kernel.org> # v3.16+
Fixes: d4332013 ("driver core: dev_get_drvdata: Don't check for NULL dev")
Acked-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NDavid Dueck <davidcdueck@googlemail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>
上级 509d612b
...@@ -126,6 +126,9 @@ struct phy_control *am335x_get_phy_control(struct device *dev) ...@@ -126,6 +126,9 @@ struct phy_control *am335x_get_phy_control(struct device *dev)
return NULL; return NULL;
dev = bus_find_device(&platform_bus_type, NULL, node, match); dev = bus_find_device(&platform_bus_type, NULL, node, match);
if (!dev)
return NULL;
ctrl_usb = dev_get_drvdata(dev); ctrl_usb = dev_get_drvdata(dev);
if (!ctrl_usb) if (!ctrl_usb)
return NULL; return NULL;
......
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