kdb_main: fix help print

The help command was chopping all the usage instructions such that
they were not readable.

Example:

bta             [D|R|S|T|C|Z|E|U|I| Backtrace all processes matching state flag
per_cpu         <sym> [<bytes>] [<c Display per_cpu variables

Where as it should look like:

bta             [D|R|S|T|C|Z|E|U|I|M|A]
                                    Backtrace all processes matching state flag
per_cpu         <sym> [<bytes>] [<cpu>]
                                    Display per_cpu variables

All that is needed is to check the how long the cmd_usage is and jump
to the next line when appropriate.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index de22c8cc6c30..25908cf2f5d7 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2442,11 +2442,15 @@ static int kdb_help(int argc, const char **argv)
         kdb_printf("-----------------------------"
                    "-----------------------------\n");
         for_each_kdbcmd(kt, i) {
-                if (kt->cmd_name)
-                        kdb_printf("%-15.15s %-20.20s %s\n", kt->cmd_name,
-                                   kt->cmd_usage, kt->cmd_help);
+                char *space = "";
                 if (KDB_FLAG(CMD_INTERRUPT))
                         return 0;
+                if (!kt->cmd_name)
+                        continue;
+                if (strlen(kt->cmd_usage) > 20)
+                        space = "\n                                    ";
+                kdb_printf("%-15.15s %-20s%s%s\n", kt->cmd_name,
+                           kt->cmd_usage, space, kt->cmd_help);
         }
         return 0;
 }