linux-kernel - [PATCH] wifi: mwifiex: added extra delay for firmware ready.

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Date:   Tue, 28 Nov 2023 16:25:44 +0800
From:   David Lin <yu-hao.lin@....com>
To:     linux-wireless@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, briannorris@...omium.org,
        kvalo@...nel.org, francesco@...cini.it, tsung-hsien.hsieh@....com,
        David Lin <yu-hao.lin@....com>
Subject: [PATCH] wifi: mwifiex: added extra delay for firmware ready.

For SDIO IW416, in a corner case FW may return ready before complete full
initialization.
Command timeout may occur at driver load after reboot.
Workaround by adding 100ms delay at checking FW status.

Signed-off-by: David Lin <yu-hao.lin@....com>
---
 drivers/net/wireless/marvell/mwifiex/sdio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/marvell/mwifiex/sdio.c b/drivers/net/wireless/marvell/mwifiex/sdio.c
index 6462a0ffe698..744e9403430a 100644
--- a/drivers/net/wireless/marvell/mwifiex/sdio.c
+++ b/drivers/net/wireless/marvell/mwifiex/sdio.c
@@ -783,6 +783,9 @@ static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
 		ret = -1;
 	}
 
+	if (!ret)
+		msleep(100);
+
 	return ret;
 }
 

base-commit: 783004b6dbda2cfe9a552a4cc9c1d168a2068f6c
-- 
2.25.1