kernel: prevent crash on errors

On ZIO loading errors we do not have any zio_device, but the kil buffer function is used anyway. This patch prevent a kernel oops is that case. Signed-off-by: Federico Vaga <federico.vaga@cern.ch>

kernel: prevent crash on errors
On ZIO loading errors we do not have any zio_device, but the kil buffer function is used anyway. This patch prevent a kernel oops is that case. Signed-off-by: Federico Vaga <federico.vaga@cern.ch>
b343b5bd · Federico Vaga · 8abdf7dd · b343b5bd
Commit b343b5bd authored Feb 17, 2015 by Federico Vaga
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ft-zio.c kernel/ft-zio.c +2 -0

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--- a/kernel/ft-zio.c
+++ b/kernel/ft-zio.c
@@ -75,6 +75,8 @@ static enum ft_devtype __ft_get_type(struct device *dev)

 void ft_zio_kill_buffer(struct fmctdc_dev *ft, int channel)
 {
+	if (ft->zdev)
+		return;
 	zio_trigger_abort_disable(&ft->zdev->cset[channel - FT_CH_1], 0);
 }