From: Meghana Madhyastha <meghana.madhyas...@gmail.com>
Some drivers like spi_bcm2835 have a max size on DMA transfers. Work
around this by splitting up the transfer if necessary.
->max_transfer_size is MAX_INT if the driver doesn't set it, so this change
will only affect drivers that set the value.
Signed-off-by: Meghana Madhyastha <meghana.madhyas...@gmail.com>
Signed-off-by: Noralf Trønnes <nor...@tronnes.org>
---
drivers/spi/spi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 05875e63be43..22bc658032b3 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1299,6 +1299,11 @@ static void __spi_pump_messages(struct spi_controller
*ctlr, bool in_kthread)
trace_spi_message_start(ctlr->cur_msg);
+ ret = spi_split_transfers_maxsize(ctlr, ctlr->cur_msg,
ctlr->max_dma_len,
+ GFP_KERNEL | GFP_DMA);
+ if (ret)
+ goto out;
+
if (ctlr->prepare_message) {
ret = ctlr->prepare_message(ctlr, ctlr->cur_msg);
if (ret) {
--
2.20.1
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