iwlwifi: pcie: clean up ICT allocation code

Since iwl_trans_pcie_alloc_ict is called in the PCIe
allocation code, we always set CSR_INT_BIT_RX_PERIODIC.
Move that bit to the default list of interrupts we enable
and simplify the code.
Also use dma_zalloc_ and avoid to memset the memory
afterwards.
trans_pcie->ict_index is 0 since trans_pcie has just been
kzalloced, remove the redundant assignment.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-csr.h b/drivers/net/wireless/iwlwifi/iwl-csr.h
index da4eca8..bbab26e 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-csr.h
+++ b/drivers/net/wireless/iwlwifi/iwl-csr.h
@@ -198,7 +198,8 @@
                                 CSR_INT_BIT_RF_KILL | \
                                 CSR_INT_BIT_SW_RX   | \
                                 CSR_INT_BIT_WAKEUP  | \
-                                CSR_INT_BIT_ALIVE)
+                                CSR_INT_BIT_ALIVE   | \
+                                CSR_INT_BIT_RX_PERIODIC)
 
 /* interrupt flags in FH (flow handler) (PCI busmaster DMA) */
 #define CSR_FH_INT_BIT_ERR       (1 << 31) /* Error */

diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c
index 7aeec5c..b3e6564 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/rx.c
@@ -1048,7 +1048,7 @@ int iwl_pcie_alloc_ict(struct iwl_trans *trans)
        struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 
        trans_pcie->ict_tbl =
-               dma_alloc_coherent(trans->dev, ICT_SIZE,
+               dma_zalloc_coherent(trans->dev, ICT_SIZE,
                                   &trans_pcie->ict_tbl_dma,
                                   GFP_KERNEL);
        if (!trans_pcie->ict_tbl)
@@ -1060,17 +1060,10 @@ int iwl_pcie_alloc_ict(struct iwl_trans *trans)
                return -EINVAL;
        }
 
-       IWL_DEBUG_ISR(trans, "ict dma addr %Lx\n",
-                     (unsigned long long)trans_pcie->ict_tbl_dma);
+       IWL_DEBUG_ISR(trans, "ict dma addr %Lx ict vir addr %p\n",
+                     (unsigned long long)trans_pcie->ict_tbl_dma,
+                     trans_pcie->ict_tbl);
 
-       IWL_DEBUG_ISR(trans, "ict vir addr %p\n", trans_pcie->ict_tbl);
-
-       /* reset table and index to all 0 */
-       memset(trans_pcie->ict_tbl, 0, ICT_SIZE);
-       trans_pcie->ict_index = 0;
-
-       /* add periodic RX interrupt */
-       trans_pcie->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
        return 0;
 }