diff options
| author | Boris BREZILLON <b.brezillon@overkiz.com> | 2013-07-18 09:48:40 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-07-18 13:24:33 +0200 |
| commit | 9a9b1c618d835e7a6a4097eb47ee47991202a3c1 (patch) | |
| tree | 34466de4928292a864235b022015c51b7ed5bd75 /drivers/misc/atmel-ssc.c | |
| parent | Linux 3.11-rc1 (diff) | |
| download | linux-9a9b1c618d835e7a6a4097eb47ee47991202a3c1.tar.xz linux-9a9b1c618d835e7a6a4097eb47ee47991202a3c1.zip | |
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>
Diffstat (limited to 'drivers/misc/atmel-ssc.c')
| -rw-r--r-- | drivers/misc/atmel-ssc.c | 11 |
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); |