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ath10k: fix hw-restart crash inject mode for WCN3990

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The hw-restart crash inject mode is a special mode, where
there is no crash generated in the firmware, but instead
the driver restarts the firmware. In order to restart WCN3990
firmware, the driver needs to send qmi_wlan_disable message
followed by the qmi_wlan_enable message to the WCN3990 firmware.

Currently the qmi_wlan_disable message is not sent to
the WCN3990 firmware when hw-restart crash is injected,
which causes the firmware to crash when the driver sends
qmi_wlan_enable message during ath10k_restart.

Send qmi_wlan_disable to the WCN3990 firmware when the
hw-restart crash is injected via debugfs.

Tested HW: WCN3990
Tested FW: WLAN.HL.2.0-01188-QCAHLSWMTPLZ-1

Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Rakesh Pillai
2019-01-29 14:56:07 +05:30
committad av Kalle Valo
förälder 6e8a8991e2
incheckning cdb78e5af4
1 ändrade filer med 10 tillägg och 1 borttagningar
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11
drivers/net/wireless/ath/ath10k/snoc.c
Visa fil

@@ -1000,7 +1000,16 @@ static int ath10k_snoc_wlan_enable(struct ath10k *ar)
static void ath10k_snoc_wlan_disable(struct ath10k *ar)
{
if (!test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags))
struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
/* If both ATH10K_FLAG_CRASH_FLUSH and ATH10K_SNOC_FLAG_RECOVERY
* flags are not set, it means that the driver has restarted
* due to a crash inject via debugfs. In this case, the driver
* needs to restart the firmware and hence send qmi wlan disable,
* during the driver restart sequence.
*/
if (!test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags) ||
!test_bit(ATH10K_SNOC_FLAG_RECOVERY, &ar_snoc->flags))
ath10k_qmi_wlan_disable(ar);
}