From 319c2b71041f324e06dbee03c1011106cf746795 Mon Sep 17 00:00:00 2001
From: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Date: Wed, 13 Nov 2019 07:46:46 -0800
Subject: [PATCH] ath10k: Handle "invalid" BDFs for msm8998 devices
Git-commit: 319c2b71041f324e06dbee03c1011106cf746795
Patch-mainline: v5.6-rc1
References: jsc#SLE-13430
When the BDF download QMI message has the end field set to 1, it signals
the end of the transfer, and triggers the firmware to do a CRC check. The
BDFs for msm8998 devices fail this check, yet the firmware is happy to
still use the BDF. It appears that this error is not caught by the
downstream drive by concidence, therefore there are production devices
in the field where this issue needs to be handled otherwise we cannot
support wifi on them. So, attempt to detect this scenario as best we can
and treat it as non-fatal.
Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/ath/ath10k/qmi.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/qmi.c b/drivers/net/wireless/ath/ath10k/qmi.c
index ed69e9775143..7b524b614f22 100644
--- a/drivers/net/wireless/ath/ath10k/qmi.c
+++ b/drivers/net/wireless/ath/ath10k/qmi.c
@@ -279,7 +279,15 @@ static int ath10k_qmi_bdf_dnld_send_sync(struct ath10k_qmi *qmi)
if (ret < 0)
goto out;
- if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
+ /* end = 1 triggers a CRC check on the BDF. If this fails, we
+ * get a QMI_ERR_MALFORMED_MSG_V01 error, but the FW is still
+ * willing to use the BDF. For some platforms, all the valid
+ * released BDFs fail this CRC check, so attempt to detect this
+ * scenario and treat it as non-fatal.
+ */
+ if (resp.resp.result != QMI_RESULT_SUCCESS_V01 &&
+ !(req->end == 1 &&
+ resp.resp.result == QMI_ERR_MALFORMED_MSG_V01)) {
ath10k_err(ar, "failed to download board data file: %d\n",
resp.resp.error);
ret = -EINVAL;
--
2.16.4