Unverified Commit 8d699ff9 authored Sep 27, 2022 by Vincent Whitchurch Committed by Mark Brown Sep 28, 2022

spi: Split transfers larger than max size



A couple of drivers call spi_split_transfers_maxsize() from their
->prepare_message() callbacks to split transfers which are too big for
them to handle.  Add support in the core to do this based on
->max_transfer_size() to avoid code duplication.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20220927112117.77599-4-vincent.whitchurch@axis.com


Signed-off-by: Mark Brown <broonie@kernel.org>

parent 0c17ba73

drivers/spi/spi.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -1649,6 +1649,15 @@ static int __spi_pump_transfer_message(struct spi_controller *ctlr,

		trace_spi_message_start(msg);

		ret = spi_split_transfers_maxsize(ctlr, msg,
		spi_max_transfer_size(msg->spi),
		GFP_KERNEL \| GFP_DMA);
		if (ret) {
		msg->status = ret;
		spi_finalize_current_message(ctlr);
		return ret;
		}

		if (ctlr->prepare_message) {
		ret = ctlr->prepare_message(ctlr, msg);
		if (ret) {