> +#include <scsi/scsi_dbg.h>
> +#include <scsi/scsi_eh.h>
> +#include <scsi/scsi_tcq.h>
What do you need these for? Normally target drivers shouldn't need
these.
> +struct vscsibk_emulate {
> + void (*pre_function)(struct vscsibk_pend *, void *);
> + void (*post_function)(struct vscsibk_pend *, void *);
> +};
This doesn't seem to be used.
> +#define scsiback_get(_b) (atomic_inc(&(_b)->nr_unreplied_reqs))
> +#define scsiback_put(_b) \
> + do { \
> + if (atomic_dec_and_test(&(_b)->nr_unreplied_reqs)) \
> + wake_up(&(_b)->waiting_to_free);\
> + } while (0)
Normal Linux style would be to make these inline functions.
> +static void scsiback_notify_work(struct vscsibk_info *info)
> +{
> + info->waiting_reqs = 1;
> + wake_up(&info->wq);
> +}
> +
> +static irqreturn_t scsiback_intr(int irq, void *dev_id)
> +{
> + scsiback_notify_work((struct vscsibk_info *)dev_id);
> + return IRQ_HANDLED;
> +}
Seems like this driver should get the same threaded irq treatment as
the initiator side?
> +static void scsiback_disconnect(struct vscsibk_info *info)
> +{
> + if (info->kthread) {
> + kthread_stop(info->kthread);
> + info->kthread = NULL;
> + wake_up(&info->shutdown_wq);
> + }
> +
> + wait_event(info->waiting_to_free,
> + atomic_read(&info->nr_unreplied_reqs) == 0);
> +
> + if (info->irq) {
> + unbind_from_irqhandler(info->irq, info);
> + info->irq = 0;
> + }
> +
> + if (info->ring.sring) {
> + xenbus_unmap_ring_vfree(info->dev, info->ring.sring);
> + info->ring.sring = NULL;
> + }
> +}
Also the same treatment for goto based init failure unwinding.
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