diff options
| author |   Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2011-08-25 23:11:29 -0700 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2011-08-29 15:33:00 -0400 |
| commit | 5f178cd2ebe8ac196b245428c574f1def1964b14 (patch) | |
| tree | fcf8fb7326c374304e4cfbc376b828f863f94b4f /drivers/net/wireless/iwlwifi/iwl-trans.c | |
| parent | iwlagn: cosmetics in iwl-trans.h (diff) | |
| download | linux-dev-5f178cd2ebe8ac196b245428c574f1def1964b14.tar.xz linux-dev-5f178cd2ebe8ac196b245428c574f1def1964b14.zip | |
iwlagn: move wait_for_tx_queue_empty to transport layer
This one is really transport related.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-trans.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-trans.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.c b/drivers/net/wireless/iwlwifi/iwl-trans.c index 9b0ecd4b1e1c..7b868c7b523a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.c +++ b/drivers/net/wireless/iwlwifi/iwl-trans.c @@ -1446,6 +1446,35 @@ static struct iwl_trans *iwl_trans_pcie_alloc(struct iwl_shared *shrd) return iwl_trans; } +#define IWL_FLUSH_WAIT_MS 2000 + +static int iwl_trans_pcie_wait_tx_queue_empty(struct iwl_trans *trans) +{ + struct iwl_tx_queue *txq; + struct iwl_queue *q; + int cnt; + unsigned long now = jiffies; + int ret = 0; + + /* waiting for all the tx frames complete might take a while */ + for (cnt = 0; cnt < hw_params(trans).max_txq_num; cnt++) { + if (cnt == trans->shrd->cmd_queue) + continue; + txq = &priv(trans)->txq[cnt]; + q = &txq->q; + while (q->read_ptr != q->write_ptr && !time_after(jiffies, + now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS))) + msleep(1); + + if (q->read_ptr != q->write_ptr) { + IWL_ERR(trans, "fail to flush all tx fifo queues\n"); + ret = -ETIMEDOUT; + break; + } + } + return ret; +} + #ifdef CONFIG_IWLWIFI_DEBUGFS /* create and remove of files */ #define DEBUGFS_ADD_FILE(name, parent, mode) do { \ @@ -2024,6 +2053,9 @@ const struct iwl_trans_ops trans_ops_pcie = { .free = iwl_trans_pcie_free, .dbgfs_register = iwl_trans_pcie_dbgfs_register, + + .wait_tx_queue_empty = iwl_trans_pcie_wait_tx_queue_empty, + .suspend = iwl_trans_pcie_suspend, .resume = iwl_trans_pcie_resume, }; |