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 <pawel.moll@arm.com> Reviewed-by: Jon Medhurst <tixy@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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1 changed files with 21 additions and 14 deletions
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@ -184,13 +184,14 @@ static int vexpress_config_schedule(struct vexpress_config_trans *trans)
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spin_lock_irqsave(&bridge->transactions_lock, flags);
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vexpress_config_dump_trans("Executing", trans);
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if (list_empty(&bridge->transactions))
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if (list_empty(&bridge->transactions)) {
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vexpress_config_dump_trans("Executing", trans);
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status = bridge->info->func_exec(trans->func->func,
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trans->offset, trans->write, trans->data);
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else
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} else {
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vexpress_config_dump_trans("Queuing", trans);
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status = VEXPRESS_CONFIG_STATUS_WAIT;
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}
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switch (status) {
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case VEXPRESS_CONFIG_STATUS_DONE:
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@ -212,25 +213,31 @@ void vexpress_config_complete(struct vexpress_config_bridge *bridge,
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{
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struct vexpress_config_trans *trans;
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unsigned long flags;
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const char *message = "Completed";
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spin_lock_irqsave(&bridge->transactions_lock, flags);
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trans = list_first_entry(&bridge->transactions,
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struct vexpress_config_trans, list);
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vexpress_config_dump_trans("Completed", trans);
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trans->status = status;
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list_del(&trans->list);
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if (!list_empty(&bridge->transactions)) {
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vexpress_config_dump_trans("Pending", trans);
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do {
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vexpress_config_dump_trans(message, trans);
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list_del(&trans->list);
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complete(&trans->completion);
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if (list_empty(&bridge->transactions))
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break;
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trans = list_first_entry(&bridge->transactions,
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struct vexpress_config_trans, list);
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vexpress_config_dump_trans("Executing pending", trans);
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trans->status = bridge->info->func_exec(trans->func->func,
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trans->offset, trans->write, trans->data);
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message = "Finished pending";
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} while (trans->status == VEXPRESS_CONFIG_STATUS_DONE);
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bridge->info->func_exec(trans->func->func, trans->offset,
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trans->write, trans->data);
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}
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spin_unlock_irqrestore(&bridge->transactions_lock, flags);
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complete(&trans->completion);
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}
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EXPORT_SYMBOL(vexpress_config_complete);
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