Hello Baolin Wang,
This is a semi-automatic email about new static checker warnings.
The patch a9081a008f84: "usb: phy: Add USB charger support" from Aug
15, 2017, leads to the following Smatch complaint:
include/linux/usb/phy.h:327 usb_phy_set_power()
warn: variable dereferenced before check 'x' (see line 325)
include/linux/usb/phy.h
322 static inline int
323 usb_phy_set_power(struct usb_phy *x, unsigned mA)
324 {
325 usb_phy_set_charger_current(x, mA);
^
The patch adds an unchecked dereference.
326
327 if (x && x->set_power)
^
The existing code checks for NULL. But so far as I know non of the
existing caller pass a NULL usb_phy and it doesn't really make sense
to me to do that. Perhaps just remove the NULL check?
328 return x->set_power(x, mA);
329 return 0;
regards,
dan carpenter
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