atmel: potential underflow in atmel_set_freq()
Smatch complains that we cap the upper bound of "fwrq->m" but not the lower bound. I don't know if it can actually happen but it's simple enough to check for negatives. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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