From 0916224eaa77bff0fbbc747961d550ff8db45457 Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Thu, 16 Aug 2018 13:01:09 +0300 Subject: [PATCH] iwlwifi: pcie: fix erroneous print When removing the driver, the following flow can happen: 1. host command is in progress, for example at index 68. 2. RX interrupt is received with the response. 3. Before it is processed, the remove flow kicks in, and calls iwl_pcie_txq_unmap. The function cleans all DMA, and promotes the read pointer to 69. 4. RX thread proceeds with the processing, and is calling iwl_pcie_cmdq_reclaim, which will print this error: iwl_pcie_cmdq_reclaim: Read index for DMA queue txq id (0), index 4 is out of range [0-256] 69 69. Detect this situation, and avoid the print. Change it to warning while at it, to make such issues more noticeable in the future. Signed-off-by: Sara Sharon Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c index 87b7225fe289..3d53842ee60e 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c @@ -1245,11 +1245,11 @@ void iwl_pcie_cmdq_reclaim(struct iwl_trans *trans, int txq_id, int idx) if (idx >= trans->cfg->base_params->max_tfd_queue_size || (!iwl_queue_used(txq, idx))) { - IWL_ERR(trans, - "%s: Read index for DMA queue txq id (%d), index %d is out of range [0-%d] %d %d.\n", - __func__, txq_id, idx, - trans->cfg->base_params->max_tfd_queue_size, - txq->write_ptr, txq->read_ptr); + WARN_ONCE(test_bit(txq_id, trans_pcie->queue_used), + "%s: Read index for DMA queue txq id (%d), index %d is out of range [0-%d] %d %d.\n", + __func__, txq_id, idx, + trans->cfg->base_params->max_tfd_queue_size, + txq->write_ptr, txq->read_ptr); return; } -- 2.17.1