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authorPhilip J Kelleher <pjk1939@linux.vnet.ibm.com>2013-06-18 14:34:54 -0500
committerJens Axboe <axboe@kernel.dk>2013-06-19 13:52:09 +0200
commita3299ab18591d36ad5622f5064619123c439b779 (patch)
tree5a08d03af4ef28eea4f1638a385d10d3fa107856 /drivers/block/rsxx
parent9138125beabbb76b4a373d4a619870f6f5d86fc5 (diff)
rsxx: Individual workqueues for interruptible events.
Giving all interrupt based events their own workqueue to complete tasks on. This fixes a bug that would cause creg commands to timeout if too many are issued at once. Signed-off-by: Philip J Kelleher <pjk1939@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/rsxx')
-rw-r--r--drivers/block/rsxx/core.c23
-rw-r--r--drivers/block/rsxx/cregs.c5
-rw-r--r--drivers/block/rsxx/rsxx_priv.h2
3 files changed, 27 insertions, 3 deletions
diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 5af21f2db29c..774f810c6a9c 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -163,12 +163,13 @@ static irqreturn_t rsxx_isr(int irq, void *pdata)
}
if (isr & CR_INTR_CREG) {
- schedule_work(&card->creg_ctrl.done_work);
+ queue_work(card->creg_ctrl.creg_wq,
+ &card->creg_ctrl.done_work);
handled++;
}
if (isr & CR_INTR_EVENT) {
- schedule_work(&card->event_work);
+ queue_work(card->event_wq, &card->event_work);
rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
handled++;
}
@@ -610,7 +611,11 @@ static int rsxx_pci_probe(struct pci_dev *dev,
}
/************* Setup Processor Command Interface *************/
- rsxx_creg_setup(card);
+ st = rsxx_creg_setup(card);
+ if (st) {
+ dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n");
+ goto failed_creg_setup;
+ }
spin_lock_irq(&card->irq_lock);
rsxx_enable_ier_and_isr(card, CR_INTR_CREG);
@@ -650,6 +655,12 @@ static int rsxx_pci_probe(struct pci_dev *dev,
}
/************* Setup Card Event Handler *************/
+ card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event");
+ if (!card->event_wq) {
+ dev_err(CARD_TO_DEV(card), "Failed card event setup.\n");
+ goto failed_event_handler;
+ }
+
INIT_WORK(&card->event_work, card_event_handler);
st = rsxx_setup_dev(card);
@@ -688,9 +699,15 @@ static int rsxx_pci_probe(struct pci_dev *dev,
return 0;
failed_create_dev:
+ destroy_workqueue(card->event_wq);
+ card->event_wq = NULL;
+failed_event_handler:
rsxx_dma_destroy(card);
failed_dma_setup:
failed_compatiblity_check:
+ destroy_workqueue(card->creg_ctrl.creg_wq);
+ card->creg_ctrl.creg_wq = NULL;
+failed_creg_setup:
spin_lock_irq(&card->irq_lock);
rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
spin_unlock_irq(&card->irq_lock);
diff --git a/drivers/block/rsxx/cregs.c b/drivers/block/rsxx/cregs.c
index 4b5c020a0a65..4914464c19fc 100644
--- a/drivers/block/rsxx/cregs.c
+++ b/drivers/block/rsxx/cregs.c
@@ -727,6 +727,11 @@ int rsxx_creg_setup(struct rsxx_cardinfo *card)
{
card->creg_ctrl.active_cmd = NULL;
+ card->creg_ctrl.creg_wq =
+ create_singlethread_workqueue(DRIVER_NAME"_creg");
+ if (!card->creg_ctrl.creg_wq)
+ return -ENOMEM;
+
INIT_WORK(&card->creg_ctrl.done_work, creg_cmd_done);
mutex_init(&card->creg_ctrl.reset_lock);
INIT_LIST_HEAD(&card->creg_ctrl.queue);
diff --git a/drivers/block/rsxx/rsxx_priv.h b/drivers/block/rsxx/rsxx_priv.h
index 382e8bf5c03b..0dd62d966772 100644
--- a/drivers/block/rsxx/rsxx_priv.h
+++ b/drivers/block/rsxx/rsxx_priv.h
@@ -134,6 +134,7 @@ struct rsxx_cardinfo {
spinlock_t lock;
bool active;
struct creg_cmd *active_cmd;
+ struct workqueue_struct *creg_wq;
struct work_struct done_work;
struct list_head queue;
unsigned int q_depth;
@@ -154,6 +155,7 @@ struct rsxx_cardinfo {
int buf_len;
} log;
+ struct workqueue_struct *event_wq;
struct work_struct event_work;
unsigned int state;
u64 size8;