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iwlwifi: pcie: reset write pointer on ict reset

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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>
This commit is contained in:
Eliad Peller 2015-07-16 20:17:42 +03:00 • committed by Emmanuel Grumbach
parent 6dfb36c89d
commit 18f5a374b3
2 changed files with 4 additions and 2 deletions
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1
drivers/net/wireless/iwlwifi/iwl-csr.h
View file

@ -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)
/*

5
drivers/net/wireless/iwlwifi/pcie/rx.c
View file

@ -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);