HSI: omap_ssi_port: avoid calling runtime_pm_*_sync inside spinlock
runtime_pm_*_sync can block when irq_safe flag is removed
from omap-ssi driver, so it may not be called while a
spinlock is held.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c
index f7ed59b..9206422 100644
--- a/drivers/hsi/controllers/omap_ssi_port.c
+++ b/drivers/hsi/controllers/omap_ssi_port.c
@@ -767,13 +767,12 @@
struct omap_ssi_port *omap_port = hsi_port_drvdata(port);
struct hsi_controller *ssi = to_hsi_controller(port->device.parent);
- spin_lock_bh(&omap_port->lock);
pm_runtime_get_sync(omap_port->pdev);
+ spin_lock_bh(&omap_port->lock);
/* Stop all the pending DMA requests for that client */
ssi_cleanup_gdd(ssi, cl);
/* Now cleanup all the queues */
ssi_cleanup_queues(cl);
- pm_runtime_put_sync(omap_port->pdev);
/* If it is the last client of the port, do extra checks and cleanup */
if (port->claimed <= 1) {
/*
@@ -782,15 +781,16 @@
*/
if (test_and_clear_bit(SSI_WAKE_EN, &omap_port->flags))
pm_runtime_put_sync(omap_port->pdev);
- pm_runtime_get_sync(omap_port->pdev);
+ pm_runtime_get(omap_port->pdev);
/* Stop any SSI TX/RX without a client */
ssi_set_port_mode(omap_port, SSI_MODE_SLEEP);
omap_port->sst.mode = SSI_MODE_SLEEP;
omap_port->ssr.mode = SSI_MODE_SLEEP;
- pm_runtime_put_sync(omap_port->pdev);
+ pm_runtime_put(omap_port->pdev);
WARN_ON(omap_port->wk_refcount != 0);
}
spin_unlock_bh(&omap_port->lock);
+ pm_runtime_put_sync(omap_port->pdev);
return 0;
}