diff options
Diffstat (limited to 'drivers/staging/cw1200/bh.c')
| -rw-r--r-- | drivers/staging/cw1200/bh.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/staging/cw1200/bh.c b/drivers/staging/cw1200/bh.c index 22b43a5f1cd..427f3e2ba52 100644 --- a/drivers/staging/cw1200/bh.c +++ b/drivers/staging/cw1200/bh.c @@ -265,7 +265,9 @@ static int cw1200_bh(void *arg) int tx_burst; int rx_burst = 0; long status; +#if defined(CONFIG_CW1200_WSM_DUMPS) size_t wsm_dump_max = -1; +#endif u32 dummy; for (;;) { @@ -301,8 +303,35 @@ static int cw1200_bh(void *arg) break; if (!status && priv->hw_bufs_used) { + unsigned long timestamp = jiffies; + long timeout; + bool pending = false; + int i; + wiphy_warn(priv->hw->wiphy, "Missed interrupt?\n"); rx = 1; + + /* Get a timestamp of "oldest" frame */ + for (i = 0; i < 4; ++i) + pending |= cw1200_queue_get_xmit_timestamp( + &priv->tx_queue[i], + ×tamp); + + /* Check if frame transmission is timed out. + * Add an extra second with respect to possible + * interrupt loss. */ + timeout = timestamp + + WSM_CMD_LAST_CHANCE_TIMEOUT + + 1 * HZ - + jiffies; + + /* And terminate BH tread if the frame is "stuck" */ + if (pending && timeout < 0) { + wiphy_warn(priv->hw->wiphy, + "Timeout waiting for TX confirm.\n"); + break; + } + #if defined(CONFIG_CW1200_DUMP_ON_ERROR) BUG_ON(1); #endif /* CONFIG_CW1200_DUMP_ON_ERROR */ |