diff options
| author | Sebastian Reichel <sre@kernel.org> | 2016-06-17 22:03:00 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2016-06-28 00:39:39 +0200 |
| commit | fa1572d956ee072e965da01d2c46f10d2b67d017 (patch) | |
| tree | 82933ab359e14e31cbd269cadfe4b680828ceaa5 /drivers/hsi | |
| parent | HSI: omap_ssi_port: avoid pm_runtime_get_sync in ssi_start_dma and ssi_start_pio (diff) | |
| download | linux-fa1572d956ee072e965da01d2c46f10d2b67d017.tar.xz linux-fa1572d956ee072e965da01d2c46f10d2b67d017.zip | |
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>
Diffstat (limited to 'drivers/hsi')
| -rw-r--r-- | drivers/hsi/controllers/omap_ssi_port.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c index f7ed59ba3b2c..92064221dbab 100644 --- a/drivers/hsi/controllers/omap_ssi_port.c +++ b/drivers/hsi/controllers/omap_ssi_port.c @@ -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; } |