Passing the value DMA_BIT_MASK(31) to dma_set_mask() causes the
dwc2-pci driver to sometimes fail (cannot enumerate the connected
device). Change it to DMA_BIT_MASK(32) instead, which is a more
sensible value anyway.
Signed-off-by: Paul Zimmerman <paulz@xxxxxxxxxxxx>
---
This should be sent to Linus for the next -rc, since without it
the dwc2-pci driver may not work when DMA mode is enabled.
drivers/staging/dwc2/hcd.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c
index 827ab78..8551cce 100644
--- a/drivers/staging/dwc2/hcd.c
+++ b/drivers/staging/dwc2/hcd.c
@@ -2804,9 +2804,8 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
/* Set device flags indicating whether the HCD supports DMA */
if (hsotg->core_params->dma_enable > 0) {
- if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(31)) < 0)
- dev_warn(hsotg->dev,
- "can't enable workaround for >2GB RAM\n");
+ if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
+ dev_warn(hsotg->dev, "can't set DMA mask\n");
if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(31)) < 0)
dev_warn(hsotg->dev,
"can't enable workaround for >2GB RAM\n");
--
1.8.2.rc0.16.g20a599e
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