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authorMasahiro Yamada <[email protected]>2018-09-13 14:58:49 +0900
committerBoris Brezillon <[email protected]>2018-09-15 10:05:26 +0200
commitcf51e4b9c34407bf0c3d9b582b7837e047e1df47 (patch)
tree67c7174f879318cb5fd625f8f0eee0a61e85ee34 /tools/perf/util/trace-event-scripting.c
parent21a268069203cc72d1b2990bc68386516fabc274 (diff)
mtd: rawnand: denali: fix a race condition when DMA is kicked
I thought the read-back of the DMA_ENABLE register was unnecessary (at least it is working on my boards), then deleted it in commit 586a2c52909d ("mtd: nand: denali: squash denali_enable_dma() helper into caller"). Sorry, I was wrong - it caused a timing issue on Cyclone5 SoCFPGAs. Revive the register read-back, commenting why this is necessary. Fixes: 586a2c52909d ("mtd: nand: denali: squash denali_enable_dma() helper into caller") Cc: <[email protected]> Reported-by: Steffen Trumtrar <[email protected]> Signed-off-by: Masahiro Yamada <[email protected]> Reviewed-by: Miquel Raynal <[email protected]> Signed-off-by: Boris Brezillon <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
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