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kgdb: Respect that flush op is optional

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Not all kgdb I/O drivers implement a flush operation. Adjust
gdbstub_exit accordingly.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
This commit is contained in:
Jan Kiszka 2012-03-16 13:17:13 +01:00 committed by Jason Wessel
parent 639077fb69
commit 9fbe465efc
1 changed files with 2 additions and 1 deletions
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3
kernel/debug/gdbstub.c
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@ -1129,5 +1129,6 @@ void gdbstub_exit(int status)
dbg_io_ops->write_char(hex_asc_lo(checksum));
/* make sure the output is flushed, lest the bootloader clobber it */
dbg_io_ops->flush();
if (dbg_io_ops->flush)
dbg_io_ops->flush();
}