Commit 5429b51f authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
Browse files

dmaengine: fix null ptr check for __dma_async_device_channel_register() 



Add check to pointer after assignment before accessing members.

Fixes: d2fb0a04: ("dmaengine: break out channel registration")

Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/158049351973.45445.3291586905226032744.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent a9113a90

drivers/dma/dmaengine.c

+3 −0
Original line number Diff line number Diff line
@@ -962,6 +962,9 @@ static int __dma_async_device_channel_register(struct dma_device *device, 


	tchan = list_first_entry_or_null(&device->channels,

					 struct dma_chan, device_node);

	if (!tchan)

		return -ENODEV;



	if (tchan->dev) {

		idr_ref = tchan->dev->idr_ref;

	} else {

CRA Git | Maintained and supported by SUSTech CRA and CCSE