HSI: omap_ssi_core: remove pm_runtime_get_sync call from tasklet

We may not call pm_runtime_get_sync() from tasklet, since
it can block once pm_runtime_irq_safe is removed for omap-ssi.

Since irq can should only be created for a running device,
we assume, that the device is already running and use non-
synchronous API instead.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c
index 618db80577c3..79562ce65579 100644
--- a/drivers/hsi/controllers/omap_ssi_core.c
+++ b/drivers/hsi/controllers/omap_ssi_core.c
@@ -255,7 +255,13 @@ static void ssi_gdd_tasklet(unsigned long dev)
         unsigned int lch;
         u32 status_reg;
 
-        pm_runtime_get_sync(ssi->device.parent);
+        pm_runtime_get(ssi->device.parent);
+
+        if (!pm_runtime_active(ssi->device.parent)) {
+                dev_warn(ssi->device.parent, "ssi_gdd_tasklet called without runtime PM!\n");
+                pm_runtime_put(ssi->device.parent);
+                return;
+        }
 
         status_reg = readl(sys + SSI_GDD_MPU_IRQ_STATUS_REG);
         for (lch = 0; lch < SSI_MAX_GDD_LCH; lch++) {