[PATCH 2/2] [media] netup_unidvb: delete null dereference

From	Julia Lawall <Julia.Lawall@lip6.fr>
Newsgroups	linux.kernel
Subject	[PATCH 2/2] [media] netup_unidvb: delete null dereference
Date	2015-10-17 11:50 +0200
Message-ID	<qkwhI-1Ly-19@gated-at.bofh.it> (permalink)
References	<qkwhI-1Ly-21@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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The calls to dev_dbg will not work properly when spi is NULL.  Just use
pr_debug instead.

Problem found using scripts/coccinelle/null/deref_null.cocci

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/media/pci/netup_unidvb/netup_unidvb_spi.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c b/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c
index f55b327..026895f 100644
--- a/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c
+++ b/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c
@@ -81,8 +81,7 @@ irqreturn_t netup_spi_interrupt(struct netup_spi *spi)
 	unsigned long flags;
 
 	if (!spi) {
-		dev_dbg(&spi->master->dev,
-			"%s(): SPI not initialized\n", __func__);
+		pr_debug("%s(): SPI not initialized\n", __func__);
 		return IRQ_NONE;
 	}
 	spin_lock_irqsave(&spi->lock, flags);
@@ -235,8 +234,7 @@ void netup_spi_release(struct netup_unidvb_dev *ndev)
 	struct netup_spi *spi = ndev->spi;
 
 	if (!spi) {
-		dev_dbg(&spi->master->dev,
-			"%s(): SPI not initialized\n", __func__);
+		pr_debug("%s(): SPI not initialized\n", __func__);
 		return;
 	}
 	spin_lock_irqsave(&spi->lock, flags);

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[PATCH 2/2] [media] netup_unidvb: delete null dereference Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-17 11:50 +0200

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