pinctrl: single: Fix potential division by zero
There is a possibility of dividing by zero due to the pcs->bits_per_pin if pcs->fmask() also has a value of zero and called fls from asm-generic/bitops/builtin-fls.h or arch/x86/include/asm/bitops.h. The function pcs_probe() has the branch that assigned to fmask 0 before pcs_allocate_pin_table() was called Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 4e7e8017 ("pinctrl: pinctrl-single: enhance to configure multiple pins of different modules") Signed-off-by: NMaxim Korotkov <korotkov.maxim.s@gmail.com> Reviewed-by: NTony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/20221117123034.27383-1-korotkov.maxim.s@gmail.comSigned-off-by: NLinus Walleij <linus.walleij@linaro.org>
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