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/* -----------------------------------------------------------------------------
* Copyright (c) 2011 Ozmo Inc
* Released under the GNU General Public License Version 2 (GPLv2).
* -----------------------------------------------------------------------------
*/
#include <linux/usb.h>
#include "ozconfig.h"
#ifdef WANT_URB_PARANOIA
#include "ozurbparanoia.h"
#include "oztrace.h"
/*-----------------------------------------------------------------------------
*/
#define OZ_MAX_URBS 1000
struct urb *g_urb_memory[OZ_MAX_URBS];
int g_nb_urbs;
DEFINE_SPINLOCK(g_urb_mem_lock);
/*-----------------------------------------------------------------------------
*/
void oz_remember_urb(struct urb *urb)
{
unsigned long irq_state;
spin_lock_irqsave(&g_urb_mem_lock, irq_state);
if (g_nb_urbs < OZ_MAX_URBS) {
g_urb_memory[g_nb_urbs++] = urb;
oz_trace("%lu: urb up = %d %p\n", jiffies, g_nb_urbs, urb);
} else {
oz_trace("ERROR urb buffer full\n");
}
spin_unlock_irqrestore(&g_urb_mem_lock, irq_state);
}
/*------------------------------------------------------------------------------
*/
int oz_forget_urb(struct urb *urb)
{
unsigned long irq_state;
int i;
int rc = -1;
spin_lock_irqsave(&g_urb_mem_lock, irq_state);
for (i = 0; i < g_nb_urbs; i++) {
if (g_urb_memory[i] == urb) {
rc = 0;
if (--g_nb_urbs > i)
memcpy(&g_urb_memory[i], &g_urb_memory[i+1],
(g_nb_urbs - i) * sizeof(struct urb *));
oz_trace("%lu: urb down = %d %p\n",
jiffies, g_nb_urbs, urb);
}
}
spin_unlock_irqrestore(&g_urb_mem_lock, irq_state);
return rc;
}
#endif /* #ifdef WANT_URB_PARANOIA */
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