Implement device_slave_caps(). EDMA has a limited number of slots. Slave drivers such as omap_hsmmc will query the driver to make sure they don't pass in more than these many scatter segments.
Signed-off-by: Joel Fernandes <jo...@ti.com> --- Vinod, or Dan- If this patch looks ok, can you please merge in for -rc cycle? This patch is required to fix MMC support on AM33xx. This patch is blocking 3 other patches which fix various MMC things. Thanks! Notes: (1) this approach is temporary and only for -rc cycle to fix MMC on AM335x. It will be replace by the RFC series in future kernels: http://www.spinics.net/lists/arm-kernel/msg260094.html (2) Patch depends Vinod's patch at: http://permalink.gmane.org/gmane.linux.kernel/1525112 drivers/dma/edma.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 7222cbe..81d5429 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -517,6 +517,14 @@ static void edma_issue_pending(struct dma_chan *chan) spin_unlock_irqrestore(&echan->vchan.lock, flags); } +static inline int edma_slave_caps(struct dma_chan *chan, + struct dma_slave_caps *caps) +{ + caps->max_sg_nr = MAX_NR_SG; + + return 0; +} + static size_t edma_desc_size(struct edma_desc *edesc) { int i; @@ -594,6 +602,7 @@ static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma, dma->device_issue_pending = edma_issue_pending; dma->device_tx_status = edma_tx_status; dma->device_control = edma_control; + dma->device_slave_caps = edma_slave_caps; dma->dev = dev; INIT_LIST_HEAD(&dma->channels); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
