From: Avraham Stern avraham.stern@intel.com
[ Upstream commit 277f56a141fc54ef7f9e09dba65fb2e12021411d ]
When the IPC registers are used for sleep control, setting the IPC sleep bit already triggers an interrupt to the fw, so there is no need to also set the doorbell. Setting also the doorbell triggers the sleep interrupt twice which lead to an assert.
Fixes: af08571d3925 ("iwlwifi: pcie: support Bz suspend/resume trigger") Signed-off-by: Avraham Stern avraham.stern@intel.com Signed-off-by: Gregory Greenman gregory.greenman@intel.com Link: https://lore.kernel.org/r/20230413102635.b5f2f6e44d38.I4cb5b6ad4914db47a714e... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index bd50f52a1aade..1690d7a4bd9c0 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1522,19 +1522,16 @@ static int iwl_pcie_d3_handshake(struct iwl_trans *trans, bool suspend) struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); int ret;
- if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_AX210) { + if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_AX210) iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6, suspend ? UREG_DOORBELL_TO_ISR6_SUSPEND : UREG_DOORBELL_TO_ISR6_RESUME); - } else if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) { + else if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ) iwl_write32(trans, CSR_IPC_SLEEP_CONTROL, suspend ? CSR_IPC_SLEEP_CONTROL_SUSPEND : CSR_IPC_SLEEP_CONTROL_RESUME); - iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6, - UREG_DOORBELL_TO_ISR6_SLEEP_CTRL); - } else { + else return 0; - }
ret = wait_event_timeout(trans_pcie->sx_waitq, trans_pcie->sx_complete, 2 * HZ);