On 6/3/26 1:41 PM, Peter Robinson wrote:
[...]
+ if (size) {
lmb_add(bd->bi_dram[i].start, size);
+ if (IS_ENABLED(CONFIG_LMB_LIMIT_DMA_BELOW_4G))
This conditional should be inverted.
Peter Robinson , can you test this change on RPi ?
That doesn't fix the problem for me on a RPi4 4GB or a RPi5 8Gb.
Did you invert the if (IS_ENABLED...) conditional ?
Was CONFIG_LMB_LIMIT_DMA_BELOW_4G enabled in your config (maybe the
Kconfig entry "default y" part needs to be tweaked to cover these devices?)
If both conditions are met, that should behave like the old code.
I dropped my revert and applied the patch, checked the new config
option was in the generated .config (I mean you could test that with a
"make rpi_arm64_defconfig" and checking the output).
You need to invert the logic of IS_ENABLED() for this patch to work.
Marek obviously missed a !
Ah, I missed that bit in grabbing the patch, it seems to work on the
RPi4 4Gb, not tested a RPi5 yet.
Lemme send an actual fixed up patch then ...
