diff options
| author | NeilBrown <neil@brown.name> | 2018-02-06 12:22:48 +1100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2018-04-05 19:48:47 +0200 |
| commit | f27336e11571a609a11bffad3eca0d7ac63135de (patch) | |
| tree | fdf4d1e1290d2492fbe55f714796c9176ed08bbc /target/linux/ramips | |
| parent | 1c37cbbbecacbcd624f67ee7c18d76dcb478ba21 (diff) | |
| download | upstream-f27336e11571a609a11bffad3eca0d7ac63135de.tar.gz upstream-f27336e11571a609a11bffad3eca0d7ac63135de.tar.bz2 upstream-f27336e11571a609a11bffad3eca0d7ac63135de.zip | |
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>
Diffstat (limited to 'target/linux/ramips')
| -rw-r--r-- | target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c | 1 | ||||
| -rw-r--r-- | target/linux/ramips/files-4.9/drivers/mmc/host/mtk-mmc/sd.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c b/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c index ebfdc065c1..3a146f646c 100644 --- a/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c +++ b/target/linux/ramips/files-4.14/drivers/mmc/host/mtk-mmc/sd.c @@ -2821,6 +2821,7 @@ static int msdc_drv_probe(struct platform_device *pdev) host->dma.used_gpd = 0; host->dma.used_bd = 0; + mmc_dev(mmc)->dma_mask = NULL; /* using dma_alloc_coherent*/ /* todo: using 1, for all 4 slots */ host->dma.gpd = dma_alloc_coherent(NULL, MAX_GPD_NUM * sizeof(gpd_t), &host->dma.gpd_addr, GFP_KERNEL); diff --git a/target/linux/ramips/files-4.9/drivers/mmc/host/mtk-mmc/sd.c b/target/linux/ramips/files-4.9/drivers/mmc/host/mtk-mmc/sd.c index ebfdc065c1..3a146f646c 100644 --- a/target/linux/ramips/files-4.9/drivers/mmc/host/mtk-mmc/sd.c +++ b/target/linux/ramips/files-4.9/drivers/mmc/host/mtk-mmc/sd.c @@ -2821,6 +2821,7 @@ static int msdc_drv_probe(struct platform_device *pdev) host->dma.used_gpd = 0; host->dma.used_bd = 0; + mmc_dev(mmc)->dma_mask = NULL; /* using dma_alloc_coherent*/ /* todo: using 1, for all 4 slots */ host->dma.gpd = dma_alloc_coherent(NULL, MAX_GPD_NUM * sizeof(gpd_t), &host->dma.gpd_addr, GFP_KERNEL); |