[PATCH v2 12/33] staging: wfx: simplify API coherency check

Jerome Pouiller Jerome.Pouiller at silabs.com
Mon Sep 13 08:30:24 UTC 2021

From: Jérôme Pouiller <jerome.pouiller at silabs.com>

The 'channel' argument of hif_join() should never be NULL. hif_join()
does not have the responsibility to recover bug of caller. A call to
WARN() at the beginning of the function reminds this constraint to the

In current code, if the argument channel is NULL, memory leaks. The new
code just emit a warning and does not give the illusion that it is
supported (and indeed a Oops will probably raise a few lines below).

Signed-off-by: Jérôme Pouiller <jerome.pouiller at silabs.com>
 drivers/staging/wfx/hif_tx.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index 14b7e047916e..6ffbae32028b 100644
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -299,10 +299,9 @@ int hif_join(struct wfx_vif *wvif, const struct ieee80211_bss_conf *conf,
+	WARN_ON(!channel);
 	WARN_ON(sizeof(body->ssid) < ssidlen);
 	WARN(!conf->ibss_joined && !ssidlen, "joining an unknown BSS");
-	if (WARN_ON(!channel))
-		return -EINVAL;
 	if (!hif)
 		return -ENOMEM;
 	body->infrastructure_bss_mode = !conf->ibss_joined;

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