Re: [PATCH 2/2] qe/ic: refactor qe_ic to simplify

[Jason Cooper]

Hi Zhao Qiang,

Same comment as previous patch regarding the subject line.

On Tue, Jul 05, 2016 at 09:46:59AM +0800, Zhao Qiang wrote:
> there are init_qe_ic_sysfs and qeic_of_init, refactor
> them.

Same comment from previous patch about commit log.

> 
> Signed-off-by: Zhao Qiang <qiang.zhao@xxxxxxx>
> ---
>  drivers/irqchip/qe_ic.c    | 83 +++++++++++++++++++++++++---------------------
>  include/soc/fsl/qe/qe_ic.h |  7 ----
>  2 files changed, 45 insertions(+), 45 deletions(-)
> 
> diff --git a/drivers/irqchip/qe_ic.c b/drivers/irqchip/qe_ic.c
> index f7f9a81..46652c0 100644
> --- a/drivers/irqchip/qe_ic.c
> +++ b/drivers/irqchip/qe_ic.c
> @@ -317,27 +317,35 @@ unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic)
>  	return irq_linear_revmap(qe_ic->irqhost, irq);
>  }
>  
> -void __init qe_ic_init(struct device_node *node, unsigned int flags,
> -		       void (*low_handler)(struct irq_desc *desc),
> -		       void (*high_handler)(struct irq_desc *desc))
> +static int __init qe_ic_init(unsigned int flags)
>  {
> +	struct device_node *node;
>  	struct qe_ic *qe_ic;
>  	struct resource res;
> -	u32 temp = 0, ret, high_active = 0;
> +	u32 temp = 0, high_active = 0;
> +	int ret = 0;
> +
> +	node = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
> +	if (!node)
> +		return -ENODEV;
>  
>  	ret = of_address_to_resource(node, 0, &res);
> -	if (ret)
> -		return;
> +	if (ret) {
> +		ret = -ENODEV;
> +		goto err_put_node;
> +	}
>  
>  	qe_ic = kzalloc(sizeof(*qe_ic), GFP_KERNEL);
> -	if (qe_ic == NULL)
> -		return;
> +	if (qe_ic == NULL) {
> +		ret = -ENOMEM;
> +		goto err_put_node;
> +	}
>  
>  	qe_ic->irqhost = irq_domain_add_linear(node, NR_QE_IC_INTS,
>  					       &qe_ic_host_ops, qe_ic);
>  	if (qe_ic->irqhost == NULL) {
> -		kfree(qe_ic);
> -		return;
> +		ret = -ENOMEM;
> +		goto err_free_qe_ic;
>  	}
>  
>  	qe_ic->regs = ioremap(res.start, resource_size(&res));
> @@ -348,9 +356,9 @@ void __init qe_ic_init(struct device_node *node, unsigned int flags,
>  	qe_ic->virq_low = irq_of_parse_and_map(node, 1);
>  
>  	if (qe_ic->virq_low == NO_IRQ) {
> -		printk(KERN_ERR "Failed to map QE_IC low IRQ\n");
> -		kfree(qe_ic);
> -		return;
> +		pr_err("Failed to map QE_IC low IRQ\n");
> +		ret = -ENOMEM;
> +		goto err_domain_remove;
>  	}
>  
>  	/* default priority scheme is grouped. If spread mode is    */
> @@ -377,13 +385,23 @@ void __init qe_ic_init(struct device_node *node, unsigned int flags,
>  	qe_ic_write(qe_ic->regs, QEIC_CICR, temp);
>  
>  	irq_set_handler_data(qe_ic->virq_low, qe_ic);
> -	irq_set_chained_handler(qe_ic->virq_low, low_handler);
> +	irq_set_chained_handler(qe_ic->virq_low, qe_ic_cascade_low_mpic);
>  
>  	if (qe_ic->virq_high != NO_IRQ &&
>  			qe_ic->virq_high != qe_ic->virq_low) {
>  		irq_set_handler_data(qe_ic->virq_high, qe_ic);
> -		irq_set_chained_handler(qe_ic->virq_high, high_handler);
> +		irq_set_chained_handler(qe_ic->virq_high,
> +					qe_ic_cascade_high_mpic);
>  	}
> +	return ret;

of_node_put(node)?  Explicitly return success?

> +
> +err_domain_remove:
> +	irq_domain_remove(qe_ic->irqhost);
> +err_free_qe_ic:
> +	kfree(qe_ic);
> +err_put_node:
> +	of_node_put(node);
> +	return ret;
>  }
>  
>  void qe_ic_set_highest_priority(unsigned int virq, int high)
> @@ -490,37 +508,26 @@ static struct device device_qe_ic = {
>  	.bus = &qe_ic_subsys,
>  };
>  
> -static int __init init_qe_ic_sysfs(void)
> +static int __init init_qe_ic(void)
>  {
> -	int rc;
> +	int ret;
>  
> -	printk(KERN_DEBUG "Registering qe_ic with sysfs...\n");
> +	ret = qe_ic_init(0);

Sorry, build machine is down atm.  How was qe_ic_init() called
previously?  Is that removed?

> +	if (ret)
> +		return ret;
>  
> -	rc = subsys_system_register(&qe_ic_subsys, NULL);
> -	if (rc) {
> -		printk(KERN_ERR "Failed registering qe_ic sys class\n");
> +	ret = subsys_system_register(&qe_ic_subsys, NULL);
> +	if (ret) {
> +		pr_err("Failed registering qe_ic sys class\n");
>  		return -ENODEV;
>  	}
> -	rc = device_register(&device_qe_ic);
> -	if (rc) {
> -		printk(KERN_ERR "Failed registering qe_ic sys device\n");
> +	ret = device_register(&device_qe_ic);
> +	if (ret) {
> +		pr_err("Failed registering qe_ic sys device\n");
>  		return -ENODEV;
>  	}
> -	return 0;
> -}
>  
> -static int __init qeic_of_init(void)
> -{
> -	struct device_node *np;
> -
> -	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
> -	if (np) {
> -		qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
> -			   qe_ic_cascade_high_mpic);
> -		of_node_put(np);
> -	}
>  	return 0;
>  }
>  
> -subsys_initcall(qeic_of_init);
> -subsys_initcall(init_qe_ic_sysfs);
> +subsys_initcall(init_qe_ic);
> diff --git a/include/soc/fsl/qe/qe_ic.h b/include/soc/fsl/qe/qe_ic.h
> index 1e155ca..6113699 100644
> --- a/include/soc/fsl/qe/qe_ic.h
> +++ b/include/soc/fsl/qe/qe_ic.h
> @@ -58,16 +58,9 @@ enum qe_ic_grp_id {
>  };
>  
>  #ifdef CONFIG_QUICC_ENGINE
> -void qe_ic_init(struct device_node *node, unsigned int flags,
> -		void (*low_handler)(struct irq_desc *desc),
> -		void (*high_handler)(struct irq_desc *desc));
>  unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic);
>  unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic);
>  #else
> -static inline void qe_ic_init(struct device_node *node, unsigned int flags,
> -		void (*low_handler)(struct irq_desc *desc),
> -		void (*high_handler)(struct irq_desc *desc))
> -{}
>  static inline unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic)
>  { return 0; }
>  static inline unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic)

thx,

Jason.

> -- 
> 2.1.0.27.g96db324
>