066b222941
Added tracing facilities and also memory allocation and URB tracking. This is for debugging purposes and is all optional and can be switched out at compile time. Signed-off-by: Chris Kelly <ckelly@ozmodevices.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* -----------------------------------------------------------------------------
|
|
* 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 */
|
|
|