mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-29 13:53:33 +00:00
Code Issues Releases Wiki Activity

dma-direct: don't crash on device without dma_mask

Browse source 
Print a useful warning instead.

Reported-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2018-05-29 16:15:12 +02:00
parent 267d2e18a2
commit 2550bbfd49
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
lib/dma-direct.c
View file

@ -34,6 +34,13 @@ check_addr(struct device *dev, dma_addr_t dma_addr, size_t size,
const char *caller)
{
if (unlikely(dev && !dma_capable(dev, dma_addr, size))) {
if (!dev->dma_mask) {
dev_err(dev,
"%s: call on device without dma_mask\n",
caller);
return false;
}
if (*dev->dma_mask >= DMA_BIT_MASK(32)) {
dev_err(dev,
"%s: overflow %pad+%zu of device mask %llx\n",