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Commit 12e72fea authored by Pete Zaitcev's avatar Pete Zaitcev Committed by Greg Kroah-Hartman
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[PATCH] USB: implement error event in usbmon 



Implement the "error" event in usbmon.

Signed-off-by: default avatarPete Zaitcev <zaitcev@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 5b1c674d

drivers/usb/mon/mon_main.c

+16 −4
Original line number Diff line number Diff line
@@ -114,20 +114,32 @@ static void mon_submit(struct usb_bus *ubus, struct urb *urb) 


/*

 */

static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int err)

static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int error)

{

	struct mon_bus *mbus;

	unsigned long flags;

	struct list_head *pos;

	struct mon_reader *r;



	mbus = ubus->mon_bus;

	if (mbus == NULL)

		goto out_unlocked;



	/*

	 * XXX Capture the error code and the 'E' event.

	 */

	spin_lock_irqsave(&mbus->lock, flags);

	if (mbus->nreaders == 0)

		goto out_locked;



	mbus->cnt_events++;

	list_for_each (pos, &mbus->r_list) {

		r = list_entry(pos, struct mon_reader, r_link);

		r->rnf_error(r->r_data, urb, error);

	}



	spin_unlock_irqrestore(&mbus->lock, flags);

	return;



out_locked:

	spin_unlock_irqrestore(&mbus->lock, flags);

out_unlocked:

	return;

}

drivers/usb/mon/mon_text.c

+27 −0
Original line number Diff line number Diff line
@@ -182,6 +182,32 @@ static void mon_text_complete(void *data, struct urb *urb) 
	mon_text_event(rp, urb, 'C');

}



static void mon_text_error(void *data, struct urb *urb, int error)

{

	struct mon_reader_text *rp = data;

	struct mon_event_text *ep;



	if (rp->nevents >= EVENT_MAX ||

	    (ep = kmem_cache_alloc(rp->e_slab, SLAB_ATOMIC)) == NULL) {

		rp->r.m_bus->cnt_text_lost++;

		return;

	}



	ep->type = 'E';

	ep->pipe = urb->pipe;

	ep->id = (unsigned long) urb;

	ep->tstamp = 0;

	ep->length = 0;

	ep->status = error;



	ep->setup_flag = '-';

	ep->data_flag = 'E';



	rp->nevents++;

	list_add_tail(&ep->e_link, &rp->e_list);

	wake_up(&rp->wait);

}



/*

 * Fetch next event from the circular buffer.

 */
@@ -235,6 +261,7 @@ static int mon_text_open(struct inode *inode, struct file *file) 
	rp->r.m_bus = mbus;

	rp->r.r_data = rp;

	rp->r.rnf_submit = mon_text_submit;

	rp->r.rnf_error = mon_text_error;

	rp->r.rnf_complete = mon_text_complete;



	snprintf(rp->slab_name, SLAB_NAME_SZ, "mon%dt_%lx", ubus->busnum,

drivers/usb/mon/usb_mon.h

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ struct mon_reader { 
	void *r_data;		/* Use container_of instead? */



	void (*rnf_submit)(void *data, struct urb *urb);

	void (*rnf_error)(void *data, struct urb *urb, int error);

	void (*rnf_complete)(void *data, struct urb *urb);

};