ARM: OMAP: PM: Lock clocks list while generating summary

Commit a53025724052b2b1edbc982a4a248784638f563d (OMAP: Add debugfs
node to show the summary of all clocks) introduced clock summary,
however, we are interested in seeing snapshot of the clock state, not
in dynamically changing clock configurations as the data provided by
clock summary will then be useless for debugging configuration
issues. So, hold the common lock when dumping the clock summary.

Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
[nm@ti.com: added commit message]
Signed-off-by: Nishanth Menon <nm@ti.com>
[paul@pwsan.com: minor edits to commit message]
Signed-off-by: Paul Walmsley <paul@pwsan.com>

diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index 62ec5c452792706407922b5ea0173009f6247622..706b7e29397f5ebfc87a5de092eb4fd330a635ba 100644 (file)
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -461,6 +461,7 @@ static int clk_dbg_show_summary(struct seq_file *s, void *unused)
        struct clk *c;
        struct clk *pa;
 
+       mutex_lock(&clocks_mutex);
        seq_printf(s, "%-30s %-30s %-10s %s\n",
                "clock-name", "parent-name", "rate", "use-count");
 
@@ -469,6 +470,7 @@ static int clk_dbg_show_summary(struct seq_file *s, void *unused)
                seq_printf(s, "%-30s %-30s %-10lu %d\n",
                        c->name, pa ? pa->name : "none", c->rate, c->usecount);
        }
+       mutex_unlock(&clocks_mutex);
 
        return 0;
 }