[PATCH 1/2] gpu: nova-core: falcon: remove unnecessary check
From: Alexandre Courbot
Date: Fri Jul 24 2026 - 07:20:25 EST
The `try_with_base` call performed on `NV_PFALCON_FALCON_DMATRFBASE1`
already returns `EOVERFLOW` if the address is too large for the
register, making this check redundant.
Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
---
drivers/gpu/nova-core/falcon.rs | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff --git a/drivers/gpu/nova-core/falcon.rs b/drivers/gpu/nova-core/falcon.rs
index a91cbdd5d636..cd05985f5ee6 100644
--- a/drivers/gpu/nova-core/falcon.rs
+++ b/drivers/gpu/nova-core/falcon.rs
@@ -9,8 +9,7 @@
dma::{
Coherent,
CoherentBox,
- DmaAddress,
- DmaMask, //
+ DmaAddress, //
},
io::{
poll::read_poll_timeout,
@@ -534,12 +533,6 @@ fn dma_wr(
return Err(EINVAL);
}
- // The DMATRFBASE/1 register pair only supports a 49-bit address.
- if dma_start > DmaMask::new::<49>().value() {
- dev_err!(self.dev, "DMA address {:#x} exceeds 49 bits\n", dma_start);
- return Err(ERANGE);
- }
-
// DMA transfers can only be done in units of 256 bytes. Compute how many such transfers we
// need to perform.
let num_transfers = load_offsets.len.div_ceil(DMA_LEN);
--
2.55.0