From 8d699ff95534747e394e0830399b8d5dcf03e738 Mon Sep 17 00:00:00 2001 From: Vincent Whitchurch Date: Tue, 27 Sep 2022 13:21:16 +0200 Subject: 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 Link: https://lore.kernel.org/r/20220927112117.77599-4-vincent.whitchurch@axis.com Signed-off-by: Mark Brown --- drivers/spi/spi.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers') diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 3b7efdd6a694..a4771f69f5c3 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -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) { -- cgit v1.2.3