1 files changed, 6 insertions, 0 deletions

diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index ebcc2d4d2b18..478d60778453 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -516,6 +516,12 @@ static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
         int err = 0;
 
+        if (mcbsp_data->active)
+                if (freq == mcbsp_data->in_freq)
+                        return 0;
+                else
+                        return -EBUSY;
+
         /* The McBSP signal muxing functions are only available on McBSP1 */
         if (clk_id == OMAP_MCBSP_CLKR_SRC_CLKR ||
             clk_id == OMAP_MCBSP_CLKR_SRC_CLKX ||