From 4187fbd60c3993ca4a26b20db218dd4023df841c Mon Sep 17 00:00:00 2001 From: Liad Kaufman Date: Tue, 31 Oct 2017 15:54:50 +0200 Subject: [PATCH] iwlwifi: dbg: allow wrt collection before ALIVE [ Upstream commit dfd4b08cf44f27587e2053e006e43a1603328006 ] Even if no ALIVE was received, the WRT data can still be collected. Add this. Signed-off-by: Liad Kaufman Signed-off-by: Luca Coelho Signed-off-by: Sasha Levin --- drivers/net/wireless/intel/iwlwifi/fw/dbg.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c index 2fa7ec4..8390104 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c @@ -950,7 +950,20 @@ int iwl_fw_dbg_collect_desc(struct iwl_fw_runtime *fwrt, if (trigger) delay = msecs_to_jiffies(le32_to_cpu(trigger->stop_delay)); - if (WARN(fwrt->trans->state == IWL_TRANS_NO_FW, + /* + * If the loading of the FW completed successfully, the next step is to + * get the SMEM config data. Thus, if fwrt->smem_cfg.num_lmacs is non + * zero, the FW was already loaded successully. If the state is "NO_FW" + * in such a case - WARN and exit, since FW may be dead. Otherwise, we + * can try to collect the data, since FW might just not be fully + * loaded (no "ALIVE" yet), and the debug data is accessible. + * + * Corner case: got the FW alive but crashed before getting the SMEM + * config. In such a case, due to HW access problems, we might + * collect garbage. + */ + if (WARN((fwrt->trans->state == IWL_TRANS_NO_FW) && + fwrt->smem_cfg.num_lmacs, "Can't collect dbg data when FW isn't alive\n")) return -EIO; -- 2.7.4