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kdb: Avoid using dbg_io_ops until it is initialized
This fixes a bug with setting a breakpoint during kdb initialization (from kdb_cmds). Any call to kdb_printf() before the initialization of the kgdboc serial console driver (which happens much later during bootup than kdb_init), results in kernel panic due to the use of dbg_io_ops before it is initialized. Signed-off-by: Tim Bird <tim.bird@am.sony.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
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@ -689,7 +689,7 @@ int vkdb_printf(const char *fmt, va_list ap)
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if (!dbg_kdb_mode && kgdb_connected) {
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gdbstub_msg_write(kdb_buffer, retlen);
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} else {
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if (!dbg_io_ops->is_console) {
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if (dbg_io_ops && !dbg_io_ops->is_console) {
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len = strlen(kdb_buffer);
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cp = kdb_buffer;
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while (len--) {
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