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mfd: vexpress: Handle pending config transactions

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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 <pawel.moll@arm.com>
Reviewed-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Pawel Moll 2013-04-25 18:14:51 +01:00 committed by Samuel Ortiz
parent 8bf874a474
commit 367764a4d1
1 changed files with 21 additions and 14 deletions
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35
drivers/mfd/vexpress-config.c
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@ -184,13 +184,14 @@ static int vexpress_config_schedule(struct vexpress_config_trans *trans)
spin_lock_irqsave(&bridge->transactions_lock, flags);
if (list_empty(&bridge->transactions)) {
vexpress_config_dump_trans("Executing", trans);
if (list_empty(&bridge->transactions))
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;
do {
vexpress_config_dump_trans(message, trans);
list_del(&trans->list);
if (!list_empty(&bridge->transactions)) {
vexpress_config_dump_trans("Pending", trans);
bridge->info->func_exec(trans->func->func, trans->offset,
trans->write, trans->data);
}
spin_unlock_irqrestore(&bridge->transactions_lock, flags);
complete(&trans->completion);
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);
spin_unlock_irqrestore(&bridge->transactions_lock, flags);
}
EXPORT_SYMBOL(vexpress_config_complete);