clk: versal: Fix out-of-bounds parent id for DUMMY_PARENT

When a clock parent entry is DUMMY_PARENT (0xFFFFFFFE), masking it
with CLK_PARENTS_ID_MASK (0xFFFF) produces the value 0xFFFE (65534).
This value is stored in parent->id and later used as a clock array
index in versal_clock_get_parentid(). Since clock_max_idx is
typically 228, accessing clock[65534] is out-of-bounds, and the
garbage value read is used as a clock ID in subsequent clock rate
calculations, eventually causing U-Boot to crash. This is observed
as a crash during "clk dump" on AMD Versal Gen 2.

Fix this by setting parent->id = 0 for DUMMY_PARENT entries.

Fixes: 95105089afe2 ("clk: versal: Add clock driver support")
Signed-off-by: Padmarao Begari <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions