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| author |   Sara Sharon <sara.sharon@intel.com> | 2016-03-16 16:28:42 +0200 |
|---|---|---|
| committer |   Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2016-03-30 16:21:25 +0300 |
| commit | 0f851bbc28c3752440b9db334d65511909a4d427 (patch) | |
| tree | 3c9063fe58b3792f28e1345280ab3efdae1914ab /drivers/net/wireless/intel | |
| parent | iwlwifi: mvm: support bss dynamic alloc/dealloc of queues (diff) | |
| download | linux-dev-0f851bbc28c3752440b9db334d65511909a4d427.tar.xz linux-dev-0f851bbc28c3752440b9db334d65511909a4d427.zip | |
iwlwifi: pcie: write to legacy register also in MQ
Due to hardware bug, upon any shadow free-queue register write
access, a legacy RBD shadow register must be written as well.
This is required in order to trigger a copy of the shadow registers
values after MAC exits sleep state.
Specifically, the driver has to write (any value) to the legacy RBD
register each time FRBDCB is accessed.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index e379dbab685a..59a7e45b12df 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -210,8 +210,12 @@ static void iwl_pcie_rxq_inc_wr_ptr(struct iwl_trans *trans, if (trans->cfg->mq_rx_supported) iwl_write_prph(trans, RFH_Q_FRBDCB_WIDX(rxq->id), rxq->write_actual); - else - iwl_write32(trans, FH_RSCSR_CHNL0_WPTR, rxq->write_actual); + /* + * write to FH_RSCSR_CHNL0_WPTR register even in MQ as a W/A to + * hardware shadow registers bug - writing to RFH_Q_FRBDCB_WIDX will + * not wake the NIC. + */ + iwl_write32(trans, FH_RSCSR_CHNL0_WPTR, rxq->write_actual); } static void iwl_pcie_rxq_check_wrptr(struct iwl_trans *trans) |