iwlwifi: pcie: reset write pointer on ict reset

Since the CSR_DRAM_INIT_TBL_WRITE_POINTER bit wasn't set
on ict reset, in some flows (like disable ict followed by
immediate reset ict) the driver and hardware went out
of sync (the driver cleared the ict_index, while the hw
kept it intact).

Fix it by setting the flag when resetting ict.

Signed-off-by: Eliad Peller <eliad@wizery.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 faa17f2..fa71661 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-csr.h
+++ b/drivers/net/wireless/iwlwifi/iwl-csr.h
@@ -422,6 +422,7 @@ enum {
 
 /* DRAM INT TABLE */
 #define CSR_DRAM_INT_TBL_ENABLE                (1 << 31)
+#define CSR_DRAM_INIT_TBL_WRITE_POINTER        (1 << 28)
 #define CSR_DRAM_INIT_TBL_WRAP_CHECK   (1 << 27)
 
 /*

diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c
index 5561dee..454ef1d 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/rx.c
@@ -1443,8 +1443,9 @@ void iwl_pcie_reset_ict(struct iwl_trans *trans)
 
        val = trans_pcie->ict_tbl_dma >> ICT_SHIFT;
 
-       val |= CSR_DRAM_INT_TBL_ENABLE;
-       val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
+       val |= CSR_DRAM_INT_TBL_ENABLE |
+              CSR_DRAM_INIT_TBL_WRAP_CHECK |
+              CSR_DRAM_INIT_TBL_WRITE_POINTER;
 
        IWL_DEBUG_ISR(trans, "CSR_DRAM_INT_TBL_REG =0x%x\n", val);