If the PLL calc function is given bad parameters, n_start/m_start may be
higher than n_stop/m_stop, which leads to the loops iterating through
the whole u32 number space.
Fix this by failing early on such cases.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-59-tomi.valkeinen@ti.com
n_stop = min((unsigned)(clkin / fint_hw_min), hw->n_max);
n_inc = 1;
+ if (n_start > n_stop)
+ return false;
+
if (hw->errata_i886) {
swap(n_start, n_stop);
n_inc = -1;
hw->m_max);
m_inc = 1;
+ if (m_start > m_stop)
+ continue;
+
if (hw->errata_i886) {
swap(m_start, m_stop);
m_inc = -1;