Thomas Fourier [off-list ref] writes:

According to Shuah Khan[1], all `dma_map()` functions should be tested
before using the pointer. This patch checks for errors in `dma_map()`
calls and in case of failure, unmaps the previously dma_mapped regions
and returns an error.

[1] https://events.static.linuxfound.org/sites/events/files/slides/Shuah_Khan_dma_map_error.pdf

Signed-off-by: Thomas Fourier <redacted>
---
 drivers/net/ethernet/atheros/atlx/atl1.c | 38 ++++++++++++++++++++++--
 1 file changed, 36 insertions(+), 2 deletions(-)
[...]

Hi Thomas,

This doesn't seem to build. You can also see it here[1].

[1]: https://patchwork.kernel.org/project/netdevbpf/patch/20250612150542.85239-2-fourier.thomas@gmail.com/