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iwlwifi: pcie: fix TX queue locking

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When updating the write pointer, the TX queue should be locked
to get consistent state, fix that in the interrupt handler.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Johannes Berg 2014-02-27 14:36:19 +01:00 committed by Emmanuel Grumbach
parent 43aa616f32
commit 42646ba046
1 changed files with 4 additions and 1 deletions
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5
drivers/net/wireless/iwlwifi/pcie/rx.c
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@ -1042,8 +1042,11 @@ irqreturn_t iwl_pcie_irq_handler(int irq, void *dev_id)
if (inta & CSR_INT_BIT_WAKEUP) {
IWL_DEBUG_ISR(trans, "Wakeup interrupt\n");
iwl_pcie_rxq_check_wrptr(trans);
for (i = 0; i < trans->cfg->base_params->num_of_queues; i++)
for (i = 0; i < trans->cfg->base_params->num_of_queues; i++) {
spin_lock(&trans_pcie->txq[i].lock);
iwl_pcie_txq_inc_wr_ptr(trans, &trans_pcie->txq[i]);
spin_unlock(&trans_pcie->txq[i].lock);
}
isr_stats->wakeup++;