[PATCH v3 1/7] OF: Retire dma-ranges mask workaround

Robin Murphy
2024-02-09T16:50:27Z

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 --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;
- }
}

/*
--
2.39.2.101.g768bb238c484.dirty