[media] netup_unidvb: fix potential crash when spi is NULL

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c b/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c
index d659f59745048a03483e3496147392b34fc68681..f33c0de3e8490737623655e8e98587b13f9ec487 100644 (file)
--- a/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c
+++ b/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c
@@ -80,11 +80,9 @@ irqreturn_t netup_spi_interrupt(struct netup_spi *spi)
        u16 reg;
        unsigned long flags;
 
-       if (!spi) {
-               dev_dbg(&spi->master->dev,
-                       "%s(): SPI not initialized\n", __func__);
+       if (!spi)
                return IRQ_NONE;
-       }
+
        spin_lock_irqsave(&spi->lock, flags);
        reg = readw(&spi->regs->control_stat);
        if (!(reg & NETUP_SPI_CTRL_IRQ)) {
@@ -234,11 +232,9 @@ void netup_spi_release(struct netup_unidvb_dev *ndev)
        unsigned long flags;
        struct netup_spi *spi = ndev->spi;
 
-       if (!spi) {
-               dev_dbg(&spi->master->dev,
-                       "%s(): SPI not initialized\n", __func__);
+       if (!spi)
                return;
-       }
+
        spin_lock_irqsave(&spi->lock, flags);
        reg = readw(&spi->regs->control_stat);
        writew(reg | NETUP_SPI_CTRL_IRQ, &spi->regs->control_stat);