diff options
| author | Chris Kelly <ckelly@ozmodevices.com> | 2012-02-20 21:12:35 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-24 09:26:52 -0800 |
| commit | 066b2229410f2f58fa91baedd22b4dcf048e28dd (patch) | |
| tree | f2ce1ae3878d72254c6eec9b9e04f38859e09a65 /drivers/staging/ozwpan/ozurbparanoia.c | |
| parent | 56ff32fe1cf24d624ca4a68a409753fb3fd593f6 (diff) | |
staging: ozwpan: Added debug support
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>
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 */ + |