ASoC: atmel-ssc: remove clk_disable_unprepare call from critical section

clk_prepare/unprepare (and indirectly clk_prepare_enable/disable_unprepare)
may sleep and thus cannot be called in critical section.

This patch fix a bug introduced by commit
6f0d94790efe9f4481bbd7c174ef0e9b5e5db7c4 where clk_disable_unprepare was
called with user_lock hold.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index f7b90661e321..e068a76a5f6f 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -66,14 +66,19 @@ EXPORT_SYMBOL(ssc_request);
 
 void ssc_free(struct ssc_device *ssc)
 {
+        bool disable_clk = true;
+
         spin_lock(&user_lock);
-        if (ssc->user) {
+        if (ssc->user)
                 ssc->user--;
-                clk_disable_unprepare(ssc->clk);
-        } else {
+        else {
+                disable_clk = false;
                 dev_dbg(&ssc->pdev->dev, "device already free\n");
         }
         spin_unlock(&user_lock);
+
+        if (disable_clk)
+                clk_disable_unprepare(ssc->clk);
 }
 EXPORT_SYMBOL(ssc_free);