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[v4,1/7] OF: Retire dma-ranges mask workaround

Message ID 26620039901fdae52079ec1c8a4b2b324964a13e.1713523152.git.robin.murphy@arm.com (mailing list archive)
State New, archived
Headers show
Series iommu, dma-mapping: Simplify arch_setup_dma_ops() | expand

Commit Message

Robin Murphy April 19, 2024, 4:54 p.m. UTC 
The fixup adding 1 to the dma-ranges size may have been for the benefit
of some early AMD Seattle DTs, or may have merely been a just-in-case,
but either way anyone who might have deserved to get the message has
hopefully seen the warning in the 9 years we've had it there. The modern
dma_range_map mechanism should happily handle odd-sized ranges with no
ill effect, so there's little need to care anyway now. Clean it up.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
v2: Tweak commit message
---
 drivers/of/device.c | 16 ----------------
 1 file changed, 16 deletions(-)
diff mbox series

Patch

diff --git a/drivers/of/device.c b/drivers/of/device.c
index de89f9906375..a988bee2ee5a 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -129,22 +129,6 @@  int of_dma_configure_id(struct device *dev, struct device_node *np,
 				dma_end = r->dma_start + r->size;
 		}
 		size = dma_end - dma_start;
-
-		/*
-		 * Add a work around to treat the size as mask + 1 in case
-		 * it is defined in DT as a mask.
-		 */
-		if (size & 1) {
-			dev_warn(dev, "Invalid size 0x%llx for dma-range(s)\n",
-				 size);
-			size = size + 1;
-		}
-
-		if (!size) {
-			dev_err(dev, "Adjusted size 0x%llx invalid\n", size);
-			kfree(map);
-			return -EINVAL;
-		}
 	}
 
 	/*