From 45d2e268369b0c768d5a644f319758bcfd370521 Mon Sep 17 00:00:00 2001 From: Baochen Qiang Date: Wed, 28 Sep 2022 09:51:40 +0800 Subject: [PATCH] wifi: ath11k: Don't exit on wakeup failure Currently, ath11k_pcic_read() returns an error if wakeup() fails, this makes firmware crash debug quite hard because we can get nothing. Change to go ahead on wakeup failure, in that case we still may get something valid to check. There should be no mislead due to incorrect content because we are aware of the failure with the log printed. Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1 Signed-off-by: Baochen Qiang Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20220928015140.5431-1-quic_bqiang@quicinc.com --- drivers/net/wireless/ath/ath11k/pcic.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) --- a/drivers/net/wireless/ath/ath11k/pcic.c +++ b/drivers/net/wireless/ath/ath11k/pcic.c @@ -218,9 +218,16 @@ int ath11k_pcic_read(struct ath11k_base if (wakeup_required && ab->pci.ops->wakeup) { ret = ab->pci.ops->wakeup(ab); if (ret) { - ath11k_warn(ab, "failed to wakeup for read from 0x%x: %d\n", - start, ret); - return ret; + ath11k_warn(ab, + "wakeup failed, data may be invalid: %d", + ret); + /* Even though wakeup() failed, continue processing rather + * than returning because some parts of the data may still + * be valid and useful in some cases, e.g. could give us + * some clues on firmware crash. + * Mislead due to invalid data could be avoided because we + * are aware of the wakeup failure. + */ } }