Code inserted during the code merged between kernels 4.10 and 4.11-rc1
caused an early panic quickly followed by a complete shutdown for
PowerPC. The traceback was not displayed long enough to read or
photograph, thus it is not reproduced here.
The problem was bisected to commit 5657933dbb6e ("treewide: Move dma_ops
from struct dev_archdata into struct device"). The problem was a missing
copy of critical information from struct dev_archdata into struct device,
leading to the dereference of a null pointer.
This fix was suggested by Benjamin Herrenschmidt.
Fixes: commit 5657933dbb6e ("treewide: Move dma_ops from struct dev_archdata
into struct device")
Signed-off-by: Larry Finger <larry.fin...@lwfinger.net>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: regressi...@leemhuis.info <regressi...@leemhuis.info>
drivers/macintosh/macio_asic.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
index 3f041b1..f757cef2 100644
--- a/drivers/macintosh/macio_asic.c
+++ b/drivers/macintosh/macio_asic.c
@@ -392,6 +392,7 @@ static struct macio_dev * macio_add_one_device(struct
macio_chip *chip,
* To get all the fields, copy all archdata
*/
dev->ofdev.dev.archdata = chip->lbus.pdev->dev.archdata;
+ dev->ofdev.dev.dma_ops = chip->lbus.pdev->dev.dma_ops;
#endif /* CONFIG_PCI */
#ifdef DEBUG
--
2.10.2
