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microblaze: boot.c: Don't try to find NULL file

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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>
This commit is contained in:
Alistair Francis 2018-01-22 11:43:16 -08:00 committed by Edgar E. Iglesias
parent 2077fef91d
commit d4c6d3600b
1 changed files with 1 additions and 1 deletions
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hw/microblaze/boot.c
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@ -124,7 +124,7 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
kernel_cmdline = qemu_opt_get(machine_opts, "append");
dtb_arg = qemu_opt_get(machine_opts, "dtb");
/* default to pcbios dtb as passed by machine_init */
if (!dtb_arg) {
if (!dtb_arg && dtb_filename) {
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
}