iwlagn: remove most BUG_ON instances
There are a number of things in the driver that
may result in a BUG(), which is suboptimal since
it's hard to get debugging information out of
the driver in that case and the user experience
is also not good :-)
Almost all BUG_ON instances can be converted to
WARN_ON with a few lines of appropriate error
handling, so do that instead.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 3732380..e7faba5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -263,11 +263,13 @@
/* count must be power-of-two size, otherwise iwl_queue_inc_wrap
* and iwl_queue_dec_wrap are broken. */
- BUG_ON(!is_power_of_2(count));
+ if (WARN_ON(!is_power_of_2(count)))
+ return -EINVAL;
/* slots_num must be power-of-two size, otherwise
* get_cmd_index is broken. */
- BUG_ON(!is_power_of_2(slots_num));
+ if (WARN_ON(!is_power_of_2(slots_num)))
+ return -EINVAL;
q->low_mark = q->n_window / 4;
if (q->low_mark < 4)
@@ -384,7 +386,9 @@
BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
/* Initialize queue's high/low-water marks, and head/tail indexes */
- iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
+ ret = iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
+ if (ret)
+ return ret;
/* Tell device where to find queue */
priv->cfg->ops->lib->txq_init(priv, txq);
@@ -446,14 +450,19 @@
cmd->len = priv->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len);
fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
- /* If any of the command structures end up being larger than
+ /*
+ * If any of the command structures end up being larger than
* the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
* we will need to increase the size of the TFD entries
* Also, check to see if command buffer should not exceed the size
- * of device_cmd and max_cmd_size. */
- BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
- !(cmd->flags & CMD_SIZE_HUGE));
- BUG_ON(fix_size > IWL_MAX_CMD_SIZE);
+ * of device_cmd and max_cmd_size.
+ */
+ if (WARN_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
+ !(cmd->flags & CMD_SIZE_HUGE)))
+ return -EINVAL;
+
+ if (WARN_ON(fix_size > IWL_MAX_CMD_SIZE))
+ return -EINVAL;
if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
IWL_WARN(priv, "Not sending command - %s KILL\n",