From: Abylay Ospan Date: Fri, 25 Sep 2015 07:56:21 +0000 (-0300) Subject: [media] netup_unidvb: fix potential crash when spi is NULL X-Git-Tag: MMI-PSA29.97-13-9~9204^2~3 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9d2b064c0ae42ad93b2a0c7da05daef312c96bcc;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git [media] netup_unidvb: fix potential crash when spi is NULL Signed-off-by: Abylay Ospan Reported-by: Dan Carpenter Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c b/drivers/media/pci/netup_unidvb/netup_unidvb_spi.c index f55b3276f28d..56773f3893d4 100644 --- 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);