On Tue, Jul 18, 2023 at 05:00:35PM +0000, Charles Keepax wrote: > On Tue, Jul 18, 2023 at 03:42:00PM +0000, Charles Keepax wrote: > > This one appears to cause me some issues, seems to get the IRQs > > into a weird state when doing compressed stream stuff. The > > issue seems to also require commit bfa0b38c1483 ("regmap: > > maple: Implement block sync for the maple tree cache") to be > > present. So it definitely seems to relate to the cache sync, > > but not sure if it is something todo with the device itself, > > or the maple tree stuff yet. > Ah... I think I see the regcache_sync sets async=true, but then > the maple tree code immediately deletes the buffer after calling > _regmap_raw_write. So its a racy use after free. > How would we feel about having the maple tree code, clear async > again? I was going to say, it must be a maple tree issue. I think we should push that async down into the rbtree code, that's probably also broken for other cache types if used in conjunction with slow buses...
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