NeilBrown f27336e115 ramips: mtk-mmc: don't advertise highmem support. ... of_dma_configure() sets a default ->dma_mask of DMA_BIT_MASK(32), claiming devices can DMA from the full 32bit address space. The mtk-mmc driver does not support access to highmem pages, so it is really limited to the bottom 512M (actually 448M due to 64M of IO space). Setting ->dma_mask to NULL causes mmc_setup_queue() to fall-back to using BLK_BOUNCE_HIGH to tell the block layer to use a bounce-buffer for any highmem pages requiring IO. Signed-off-by: NeilBrown <neil@brown.name> Signed-off-by: Felix Fietkau <nbd@nbd.name>		2018-04-05 19:48:47 +02:00
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host/mtk-mmc	ramips: mtk-mmc: don't advertise highmem support.	2018-04-05 19:48:47 +02:00