microblaze: boot.c: Don't try to find NULL file
Previously if no device tree was passed to microblaze_load_kernel() then qemu_find_file() would try to find a NULL pointer. To avoid this put a check around qemu_find_file(). Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Reported-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
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@ -124,7 +124,7 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
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kernel_cmdline = qemu_opt_get(machine_opts, "append");
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dtb_arg = qemu_opt_get(machine_opts, "dtb");
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/* default to pcbios dtb as passed by machine_init */
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if (!dtb_arg) {
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if (!dtb_arg && dtb_filename) {
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filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
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}
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