linux-kernel - [PATCH 04/15] staging: wfx: drop useless check

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Date:   Tue,  5 May 2020 14:37:46 +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 04/15] staging: wfx: drop useless check

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

Currently, the ISR check if bus->core is not NULL. But, it is a useless
check. bus->core is initialiased before to request IRQ and it is not
assigned to NULL when it is released.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/bus_sdio.c | 9 +--------
 drivers/staging/wfx/bus_spi.c  | 4 ----
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/staging/wfx/bus_sdio.c b/drivers/staging/wfx/bus_sdio.c
index dedc3ff58d3e..9ac87178270f 100644
--- a/drivers/staging/wfx/bus_sdio.c
+++ b/drivers/staging/wfx/bus_sdio.c
@@ -91,20 +91,13 @@ static void wfx_sdio_irq_handler(struct sdio_func *func)
 {
 	struct wfx_sdio_priv *bus = sdio_get_drvdata(func);
 
-	if (bus->core)
-		wfx_bh_request_rx(bus->core);
-	else
-		WARN(!bus->core, "race condition in driver init/deinit");
+	wfx_bh_request_rx(bus->core);
 }
 
 static irqreturn_t wfx_sdio_irq_handler_ext(int irq, void *priv)
 {
 	struct wfx_sdio_priv *bus = priv;
 
-	if (!bus->core) {
-		WARN(!bus->core, "race condition in driver init/deinit");
-		return IRQ_NONE;
-	}
 	sdio_claim_host(bus->func);
 	wfx_bh_request_rx(bus->core);
 	sdio_release_host(bus->func);
diff --git a/drivers/staging/wfx/bus_spi.c b/drivers/staging/wfx/bus_spi.c
index 61e99b09decb..03f95e65d2f9 100644
--- a/drivers/staging/wfx/bus_spi.c
+++ b/drivers/staging/wfx/bus_spi.c
@@ -140,10 +140,6 @@ static irqreturn_t wfx_spi_irq_handler(int irq, void *priv)
 {
 	struct wfx_spi_priv *bus = priv;
 
-	if (!bus->core) {
-		WARN(!bus->core, "race condition in driver init/deinit");
-		return IRQ_NONE;
-	}
 	queue_work(system_highpri_wq, &bus->request_rx);
 	return IRQ_HANDLED;
 }
-- 
2.26.1