diff options
Diffstat (limited to 'drivers/staging/ozwpan/ozurbparanoia.c')
| -rw-r--r-- | drivers/staging/ozwpan/ozurbparanoia.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/staging/ozwpan/ozurbparanoia.c b/drivers/staging/ozwpan/ozurbparanoia.c new file mode 100644 index 00000000000..55b9afbbe47 --- /dev/null +++ b/drivers/staging/ozwpan/ozurbparanoia.c @@ -0,0 +1,53 @@ +/* ----------------------------------------------------------------------------- + * 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 */ + |