On Tue, 19 Jul 2016, Eric Auger wrote:
> +
> +#include <linux/slab.h>
> +#include <linux/irq.h>
> +#include <linux/msi-doorbell.h>
> +
> +struct irqchip_doorbell {
> + struct irq_chip_msi_doorbell_info info;
> + struct list_head next;
Again, please align the struct members.
> +};
> +
> +static LIST_HEAD(irqchip_doorbell_list);
> +static DEFINE_MUTEX(irqchip_doorbell_mutex);
> +
> +struct irq_chip_msi_doorbell_info *
> +msi_doorbell_register_global(phys_addr_t base, size_t size,
> + int prot, bool irq_remapping)
> +{
> + struct irqchip_doorbell *db;
> +
> + db = kmalloc(sizeof(*db), GFP_KERNEL);
> + if (!db)
> + return ERR_PTR(-ENOMEM);
> +
> + db->info.doorbell_is_percpu = false;
Please use kzalloc and get rid of zero initialization. If you add stuff to the
struct then initialization will be automatically 0.
> +void msi_doorbell_unregister_global(struct irq_chip_msi_doorbell_info
> *dbinfo)
> +{
> + struct irqchip_doorbell *db, *tmp;
> +
> + mutex_lock(&irqchip_doorbell_mutex);
> + list_for_each_entry_safe(db, tmp, &irqchip_doorbell_list, next) {
Why do you need that iterator?
db = container_of(dbinfo, struct ....., info);
Hmm?
> + if (dbinfo == &db->info) {
> + list_del(&db->next);
> + kfree(db);
Please move the kfree() outside of the lock region. It does not matter much
here, but we really should stop doing random crap in locked regions.
Thanks,
tglx
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