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skip 'in ram' check for mutable slice in fullduplex

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This commit is contained in:
Folkert 2021-06-05 11:34:50 +02:00
parent 857ac3386b
commit 3f74c557ed
1 changed files with 2 additions and 1 deletions
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embassy-nrf/src/spim.rs
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@ -196,8 +196,9 @@ impl<'d, T: Instance> FullDuplex<u8> for Spim<'d, T> {
fn read_write<'a>(&'a mut self, rx: &'a mut [u8], tx: &'a [u8]) -> Self::WriteReadFuture<'a> { fn read_write<'a>(&'a mut self, rx: &'a mut [u8], tx: &'a [u8]) -> Self::WriteReadFuture<'a> {
async move { async move {
slice_in_ram_or(rx, Error::DMABufferNotInDataMemory)?;
slice_in_ram_or(tx, Error::DMABufferNotInDataMemory)?; slice_in_ram_or(tx, Error::DMABufferNotInDataMemory)?;
// NOTE: RAM slice check for rx is not necessary, as a mutable
// slice can only be built from data located in RAM.
// Conservative compiler fence to prevent optimizations that do not // Conservative compiler fence to prevent optimizations that do not
// take in to account actions by DMA. The fence has been placed here, // take in to account actions by DMA. The fence has been placed here,