diff options
| author |   Vincent Whitchurch <vincent.whitchurch@axis.com> | 2022-09-27 13:21:16 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2022-09-28 12:54:06 +0100 |
| commit | 8d699ff95534747e394e0830399b8d5dcf03e738 (patch) | |
| tree | fa20b66163c5e3fe362c7b7a154556ee818fa2d4 /drivers/spi/spi.c | |
| parent | spi: Fix cache corruption due to DMA/PIO overlap (diff) | |
| download | linux-dev-8d699ff95534747e394e0830399b8d5dcf03e738.tar.xz linux-dev-8d699ff95534747e394e0830399b8d5dcf03e738.zip | |
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>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 9 |
1 files changed, 9 insertions, 0 deletions
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) { |