imx6ull-flash driver fixes#316

Draft

Maxez wants to merge 5 commits intomasterfrom

Maxez/imx6ull-flash-fixes

Commits on Nov 10, 2022

imx6ull-flash: check mmap() result in flashdrv_dmanew(), return NULL if mmap() failed
Lukasz Kosinski
committed
imx6ull-flash: add memory barrier before running DMA, mark variables changed by interrupt handlers as volatile
Lukasz Kosinski
committed
imx6ull-flash: remove unused function flashdrv_rundma()
Lukasz Kosinski
committed
imx6ull-flash: add mmap() checks in flashdrv
Lukasz Kosinski
committed
imx6ull-flash: fix BCH layout registers modifications in flashdrv_write()
Lukasz Kosinski
committed