From 367764a4d1c8dfbf3e24bb0ffbc5eb8c5d5bf6eb Mon Sep 17 00:00:00 2001 From: Pawel Moll Date: Thu, 25 Apr 2013 18:14:51 +0100 Subject: mfd: vexpress: Handle pending config transactions The config transactions "scheduler" was hopelessly broken, repeating completed transaction instead of picking up next pending one. Fixed now. Also improved debug messages. Signed-off-by: Pawel Moll Reviewed-by: Jon Medhurst Signed-off-by: Samuel Ortiz --- drivers/mfd/vexpress-config.c | 35 +++++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 14 deletions(-) (limited to 'drivers/mfd') diff --git a/drivers/mfd/vexpress-config.c b/drivers/mfd/vexpress-config.c index 3c1723aa6225..84ce6b9daa3d 100644 --- a/drivers/mfd/vexpress-config.c +++ b/drivers/mfd/vexpress-config.c @@ -184,13 +184,14 @@ static int vexpress_config_schedule(struct vexpress_config_trans *trans) spin_lock_irqsave(&bridge->transactions_lock, flags); - vexpress_config_dump_trans("Executing", trans); - - if (list_empty(&bridge->transactions)) + if (list_empty(&bridge->transactions)) { + vexpress_config_dump_trans("Executing", trans); status = bridge->info->func_exec(trans->func->func, trans->offset, trans->write, trans->data); - else + } else { + vexpress_config_dump_trans("Queuing", trans); status = VEXPRESS_CONFIG_STATUS_WAIT; + } switch (status) { case VEXPRESS_CONFIG_STATUS_DONE: @@ -212,25 +213,31 @@ void vexpress_config_complete(struct vexpress_config_bridge *bridge, { struct vexpress_config_trans *trans; unsigned long flags; + const char *message = "Completed"; spin_lock_irqsave(&bridge->transactions_lock, flags); trans = list_first_entry(&bridge->transactions, struct vexpress_config_trans, list); - vexpress_config_dump_trans("Completed", trans); - trans->status = status; - list_del(&trans->list); - if (!list_empty(&bridge->transactions)) { - vexpress_config_dump_trans("Pending", trans); + do { + vexpress_config_dump_trans(message, trans); + list_del(&trans->list); + complete(&trans->completion); - bridge->info->func_exec(trans->func->func, trans->offset, - trans->write, trans->data); - } - spin_unlock_irqrestore(&bridge->transactions_lock, flags); + if (list_empty(&bridge->transactions)) + break; + + trans = list_first_entry(&bridge->transactions, + struct vexpress_config_trans, list); + vexpress_config_dump_trans("Executing pending", trans); + trans->status = bridge->info->func_exec(trans->func->func, + trans->offset, trans->write, trans->data); + message = "Finished pending"; + } while (trans->status == VEXPRESS_CONFIG_STATUS_DONE); - complete(&trans->completion); + spin_unlock_irqrestore(&bridge->transactions_lock, flags); } EXPORT_SYMBOL(vexpress_config_complete); -- cgit v1.2.3