UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Sara Sharon 2016-03-16 16:28:42 +02:00 committed by Emmanuel Grumbach
parent 24afba7690
commit 0f851bbc28
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/intel/iwlwifi/pcie/rx.c
View File

@ -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)