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| author | Sebastian Reichel <sre@kernel.org> | 2016-05-20 06:25:06 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2016-06-28 00:40:00 +0200 |
| commit | 4e552310cdf0c81210b5fc9173f7cf497eeb9feb (patch) | |
| tree | f9f4e8bdcbb87627e9a4431a55ef39f6d973adba | |
| parent | 604fdfa45886f04ad6070c1b8266c7f4154bc497 (diff) | |
| download | linux-stable-4e552310cdf0c81210b5fc9173f7cf497eeb9feb.tar.gz linux-stable-4e552310cdf0c81210b5fc9173f7cf497eeb9feb.tar.bz2 linux-stable-4e552310cdf0c81210b5fc9173f7cf497eeb9feb.zip | |
HSI: omap_ssi: call msg->complete() from process context
msg->complete() should always be called from process context once
irq_safe runtime pm flag is no longer set for omap-ssi.
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
| -rw-r--r-- | drivers/hsi/controllers/omap_ssi.h | 4 | ||||
| -rw-r--r-- | drivers/hsi/controllers/omap_ssi_core.c | 4 | ||||
| -rw-r--r-- | drivers/hsi/controllers/omap_ssi_port.c | 18 |
3 files changed, 25 insertions, 1 deletions
diff --git a/drivers/hsi/controllers/omap_ssi.h b/drivers/hsi/controllers/omap_ssi.h index 99143f4f8837..32ced0c8f789 100644 --- a/drivers/hsi/controllers/omap_ssi.h +++ b/drivers/hsi/controllers/omap_ssi.h @@ -73,6 +73,8 @@ struct omap_ssm_ctx { * @txqueue: TX message queues * @rxqueue: RX message queues * @brkqueue: Queue of incoming HWBREAK requests (FRAME mode) + * @errqueue: Queue for failed messages + * @errqueue_work: Delayed Work for failed messages * @irq: IRQ number * @wake_irq: IRQ number for incoming wake line (-1 if none) * @wake_gpio: GPIO number for incoming wake line (-1 if none) @@ -96,6 +98,8 @@ struct omap_ssi_port { struct list_head txqueue[SSI_MAX_CHANNELS]; struct list_head rxqueue[SSI_MAX_CHANNELS]; struct list_head brkqueue; + struct list_head errqueue; + struct delayed_work errqueue_work; unsigned int irq; int wake_irq; struct gpio_desc *wake_gpio; diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c index 79562ce65579..506a9f1ef7ad 100644 --- a/drivers/hsi/controllers/omap_ssi_core.c +++ b/drivers/hsi/controllers/omap_ssi_core.c @@ -235,7 +235,9 @@ static void ssi_gdd_complete(struct hsi_controller *ssi, unsigned int lch) spin_lock(&omap_port->lock); list_del(&msg->link); /* Dequeue msg */ spin_unlock(&omap_port->lock); - msg->complete(msg); + + list_add_tail(&msg->link, &omap_port->errqueue); + schedule_delayed_work(&omap_port->errqueue_work, 0); return; } spin_lock(&omap_port->lock); diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c index f91c6a4bb1a5..7717c769c4dd 100644 --- a/drivers/hsi/controllers/omap_ssi_port.c +++ b/drivers/hsi/controllers/omap_ssi_port.c @@ -193,6 +193,21 @@ static int ssi_debug_add_port(struct omap_ssi_port *omap_port, } #endif +static void ssi_process_errqueue(struct work_struct *work) +{ + struct omap_ssi_port *omap_port; + struct list_head *head, *tmp; + struct hsi_msg *msg; + + omap_port = container_of(work, struct omap_ssi_port, errqueue_work.work); + + list_for_each_safe(head, tmp, &omap_port->errqueue) { + msg = list_entry(head, struct hsi_msg, link); + msg->complete(msg); + list_del(head); + } +} + static int ssi_claim_lch(struct hsi_msg *msg) { @@ -1170,6 +1185,7 @@ static int ssi_port_probe(struct platform_device *pd) omap_port->pdev = &pd->dev; omap_port->port_id = port_id; + INIT_DEFERRABLE_WORK(&omap_port->errqueue_work, ssi_process_errqueue); INIT_WORK(&omap_port->work, start_tx_work); /* initialize HSI port */ @@ -1237,6 +1253,8 @@ static int ssi_port_remove(struct platform_device *pd) ssi_debug_remove_port(port); #endif + cancel_delayed_work_sync(&omap_port->errqueue_work); + hsi_port_unregister_clients(port); port->async = hsi_dummy_msg; |