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kdb: Fix smatch warning on dbg_io_ops->is_console

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The Smatch tool warned that the change from commit b8adde8dd
(kdb: Avoid using dbg_io_ops until it is initialized) should
add another null check later in the kdb_printf().

It is worth noting that the second use of dbg_io_ops->is_console
is protected by the KDB_PAGER state variable which would only
get set when kdb is fully active and initialized.  If we
ever encounter changes or defects in the KDB_PAGER state
we do not want to crash the kernel in a kdb_printf/printk.

CC: Tim Bird <tim.bird@am.sony.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jason Wessel 2012-03-29 06:17:17 -05:00
parent 1ba0c1720e
commit 78724b8ef8
1 changed files with 1 additions and 1 deletions
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2
kernel/debug/kdb/kdb_io.c
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@ -743,7 +743,7 @@ kdb_printit:
kdb_input_flush();
c = console_drivers;
if (!dbg_io_ops->is_console) {
if (dbg_io_ops && !dbg_io_ops->is_console) {
len = strlen(moreprompt);
cp = moreprompt;
while (len--) {