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ARM: common: fiq_debugger: dump sysrq directly to console if enabled

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If the fiq console is enabled, then don't filter the console output
while sysrq command is in progress.

Change-Id: I9389d757373a5fdca5cbf61f0723667510d3ae88
This commit is contained in:
Dima Zavin 2011-11-09 16:48:00 -08:00
parent b11ab5b329
commit 1e78d52ab8
1 changed files with 28 additions and 4 deletions
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32
arch/arm/common/fiq_debugger.c
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@ -86,6 +86,7 @@ struct fiq_debugger_state {
struct tty_struct *tty;
int tty_open_count;
struct fiq_debugger_ringbuf *tty_rbuf;
bool syslog_dumping;
#endif
unsigned int last_irqs[NR_IRQS];
@ -496,14 +497,29 @@ static void do_ps(struct fiq_debugger_state *state)
read_unlock(&tasklist_lock);
}
#ifdef CONFIG_FIQ_DEBUGGER_CONSOLE
static void begin_syslog_dump(struct fiq_debugger_state *state)
{
state->syslog_dumping = true;
}
static void end_syslog_dump(struct fiq_debugger_state *state)
{
state->syslog_dumping = false;
}
#else
extern int do_syslog(int type, char __user *bug, int count);
static void do_sysrq(struct fiq_debugger_state *state, char rq)
static void begin_syslog_dump(struct fiq_debugger_state *state)
{
do_syslog(5 /* clear */, NULL, 0);
}
static void end_syslog_dump(struct fiq_debugger_state *state)
{
char buf[128];
int ret;
int idx = 0;
do_syslog(5 /* clear */, NULL, 0);
handle_sysrq(rq);
while (1) {
ret = log_buf_copy(buf, idx, sizeof(buf) - 1);
if (ret <= 0)
@ -513,6 +529,14 @@ static void do_sysrq(struct fiq_debugger_state *state, char rq)
idx += ret;
}
}
#endif
static void do_sysrq(struct fiq_debugger_state *state, char rq)
{
begin_syslog_dump(state);
handle_sysrq(rq);
end_syslog_dump(state);
}
/* This function CANNOT be called in FIQ context */
static void debug_irq_exec(struct fiq_debugger_state *state, char *cmd)
@ -871,7 +895,7 @@ static void debug_console_write(struct console *co,
state = container_of(co, struct fiq_debugger_state, console);
if (!state->console_enable)
if (!state->console_enable && !state->syslog_dumping)
return;
debug_uart_enable(state);