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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>
This commit is contained in:
Sebastian Reichel 2016-06-17 22:03:00 +02:00
parent 62aa292b3e
commit fa1572d956
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/hsi/controllers/omap_ssi_port.c
View File

@ -767,13 +767,12 @@ static int ssi_release(struct hsi_client *cl)
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 @@ static int ssi_release(struct hsi_client *cl)
*/
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;
}