On Tue, 2020-09-08 at 11:43 +0200, Christoph Hellwig wrote: > And because I like replying to myself so much, here is a link to the > version with the arm cleanup patch applied. Unlike the previous two > attempts this has at least survived very basic sanity testing: > > http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma-ranges.2 > > Note that we'll still need to sort out the arm/keystone warnings from > the original patch. Do we have anyone on the CC list who knows that > platform a little better to figure out if the ifdef solution would work?
Had to do the following to boot without errors:
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index ef61a33c47bc..7dd88a0b6d0b 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -97,6 +97,9 @@ static inline bool dma_capable(struct device *dev, dma_addr_t
addr, size_t size,
{
dma_addr_t end = addr + size - 1;
+ if (addr == DMA_MAPPING_ERROR)
+ return false;
+
if (!dev->dma_mask)
return false;
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 90f1ecb6baaf..25809703a5bf 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -71,7 +71,12 @@ static gfp_t dma_direct_optimal_gfp_mask(struct device *dev,
u64 dma_mask,
static bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size)
{
- return phys_to_dma_direct(dev, phys) + size - 1 <=
+ dma_addr_t dma_addr = phys_to_dma_direct(dev, phys);
+
+ if (dma_addr == DMA_MAPPING_ERROR)
+ return false;
+
+ return dma_addr + size - 1 <=
min_not_zero(dev->coherent_dma_mask,
dev->bus_dma_limit);
}
Regards,
Nicolas
signature.asc
Description: This is a digitally signed message part
_______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
