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

From: Julia Lawall
Date: Sat Oct 17 2015 - 05:44:17 EST


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@xxxxxxx>

---
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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