• Tony Lindgren's avatar
    pinctrl: add checks for empty function names · b9130b77
    Tony Lindgren authored
    This is needed as otherwise we can get the following when
    dealing with buggy data in a pinmux driver for
    pinmux_search_function:
    
    Unable to handle kernel NULL pointer dereference at virtual
    address 00000000
    ...
    PC is at strcmp+0xc/0x34
    LR is at pinmux_get+0x350/0x8f4
    ...
    
    As we need pctldev initialized to call ops->list_functions,
    let's initialize it before check_ops calls and pass the
    pctldev to the check_ops functions. Do this for both pinmux
    and pinconf check_ops functions.
    Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
    b9130b77
pinconf.c 8.29 KB