linux-kernel - [PATCH v2 33/33] staging: wfx: early exit of PDS is not correct

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Date:   Mon, 13 Sep 2021 10:30:45 +0200
From:   Jerome Pouiller <Jerome.Pouiller@...abs.com>
To:     devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller 
        <jerome.pouiller@...abs.com>
Subject: [PATCH v2 33/33] staging: wfx: early exit of PDS is not correct

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

If PDS data is not correct, the device is unlikely to work. Worse, the
pinmux maybe it misconfigured and it can generate IRQ-storms. Therefore,
do not try to start-up the device if PDS is invalid.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c
index 4386e9957ee6..b24ff4b31b72 100644
--- a/drivers/staging/wfx/main.c
+++ b/drivers/staging/wfx/main.c
@@ -409,7 +409,9 @@ int wfx_probe(struct wfx_dev *wdev)
 
 	dev_dbg(wdev->dev, "sending configuration file %s\n",
 		wdev->pdata.file_pds);
-	wfx_send_pdata_pds(wdev);
+	err = wfx_send_pdata_pds(wdev);
+	if (err)
+		goto err0;
 
 	wdev->poll_irq = false;
 	err = wdev->hwbus_ops->irq_subscribe(wdev->hwbus_priv);
-- 
2.33.0