From 24408e7ae677cea4e44ce6869a1b803820839471 Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Mon, 28 Sep 2015 14:12:38 -0400 Subject: i40e/i40evf: grab the AQ spinlocks before clearing registers Make sure we have the spinlocks before we clear the ARQ and ASQ management registers. Also, widen the locked portion and make a sanity check earlier in the send function to be sure we're working with safe register values. Change-ID: I34b56044b33461ed780f3d2de8d62826cdf933f9 Signed-off-by: Shannon Nelson Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40evf/i40e_adminq.c | 45 +++++++++++++------------ 1 file changed, 23 insertions(+), 22 deletions(-) (limited to 'drivers/net/ethernet/intel/i40evf/i40e_adminq.c') diff --git a/drivers/net/ethernet/intel/i40evf/i40e_adminq.c b/drivers/net/ethernet/intel/i40evf/i40e_adminq.c index 5026773a7c26..c7f59e002cb6 100644 --- a/drivers/net/ethernet/intel/i40evf/i40e_adminq.c +++ b/drivers/net/ethernet/intel/i40evf/i40e_adminq.c @@ -469,8 +469,12 @@ static i40e_status i40e_shutdown_asq(struct i40e_hw *hw) { i40e_status ret_code = 0; - if (hw->aq.asq.count == 0) - return I40E_ERR_NOT_READY; + mutex_lock(&hw->aq.asq_mutex); + + if (hw->aq.asq.count == 0) { + ret_code = I40E_ERR_NOT_READY; + goto shutdown_asq_out; + } /* Stop firmware AdminQ processing */ wr32(hw, hw->aq.asq.head, 0); @@ -479,16 +483,13 @@ static i40e_status i40e_shutdown_asq(struct i40e_hw *hw) wr32(hw, hw->aq.asq.bal, 0); wr32(hw, hw->aq.asq.bah, 0); - /* make sure lock is available */ - mutex_lock(&hw->aq.asq_mutex); - hw->aq.asq.count = 0; /* to indicate uninitialized queue */ /* free ring buffers */ i40e_free_asq_bufs(hw); +shutdown_asq_out: mutex_unlock(&hw->aq.asq_mutex); - return ret_code; } @@ -502,8 +503,12 @@ static i40e_status i40e_shutdown_arq(struct i40e_hw *hw) { i40e_status ret_code = 0; - if (hw->aq.arq.count == 0) - return I40E_ERR_NOT_READY; + mutex_lock(&hw->aq.arq_mutex); + + if (hw->aq.arq.count == 0) { + ret_code = I40E_ERR_NOT_READY; + goto shutdown_arq_out; + } /* Stop firmware AdminQ processing */ wr32(hw, hw->aq.arq.head, 0); @@ -512,16 +517,13 @@ static i40e_status i40e_shutdown_arq(struct i40e_hw *hw) wr32(hw, hw->aq.arq.bal, 0); wr32(hw, hw->aq.arq.bah, 0); - /* make sure lock is available */ - mutex_lock(&hw->aq.arq_mutex); - hw->aq.arq.count = 0; /* to indicate uninitialized queue */ /* free ring buffers */ i40e_free_arq_bufs(hw); +shutdown_arq_out: mutex_unlock(&hw->aq.arq_mutex); - return ret_code; } @@ -685,19 +687,21 @@ i40e_status i40evf_asq_send_command(struct i40e_hw *hw, u16 retval = 0; u32 val = 0; - val = rd32(hw, hw->aq.asq.head); - if (val >= hw->aq.num_asq_entries) { + mutex_lock(&hw->aq.asq_mutex); + + if (hw->aq.asq.count == 0) { i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, - "AQTX: head overrun at %d\n", val); + "AQTX: Admin queue not initialized.\n"); status = I40E_ERR_QUEUE_EMPTY; - goto asq_send_command_exit; + goto asq_send_command_error; } - if (hw->aq.asq.count == 0) { + val = rd32(hw, hw->aq.asq.head); + if (val >= hw->aq.num_asq_entries) { i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, - "AQTX: Admin queue not initialized.\n"); + "AQTX: head overrun at %d\n", val); status = I40E_ERR_QUEUE_EMPTY; - goto asq_send_command_exit; + goto asq_send_command_error; } details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use); @@ -722,8 +726,6 @@ i40e_status i40evf_asq_send_command(struct i40e_hw *hw, desc->flags &= ~cpu_to_le16(details->flags_dis); desc->flags |= cpu_to_le16(details->flags_ena); - mutex_lock(&hw->aq.asq_mutex); - if (buff_size > hw->aq.asq_buf_size) { i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, @@ -848,7 +850,6 @@ i40e_status i40evf_asq_send_command(struct i40e_hw *hw, asq_send_command_error: mutex_unlock(&hw->aq.asq_mutex); -asq_send_command_exit: return status; } -- cgit v1.2.3-59-g8ed1b