iwlwifi: use 4k queue size for Bz A-step

There's a hardware bug in Bz A-step that can be worked
around by using 4k queue size, so do that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220304131517.10ea0e115d05.Idfb3706133bf3b15f1f68f1145e77e89947449d1@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/queue/tx.c b/drivers/net/wireless/intel/iwlwifi/queue/tx.c
index 42e631cc16e81fd19e75086b92b0d448f47f8683..726185d6fab8b724ee680daa660b4be2b0776fba 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/queue/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/queue/tx.c
@@ -1199,6 +1199,10 @@ int iwl_txq_dyn_alloc(struct iwl_trans *trans, u32 flags, u32 sta_mask,
        };
        int ret;
 
+       if (trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_BZ &&
+           trans->hw_rev_step == SILICON_A_STEP)
+               size = 4096;
+
        txq = iwl_txq_dyn_alloc_dma(trans, size, timeout);
        if (IS_ERR(txq))
                return PTR_ERR(txq);