From 715dc9a1f0c8ae0bbd4e5b37f9a165ea39e47fe9 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Leonard=20G=C3=B6hrs?= Date: Wed, 16 Aug 2023 16:52:37 +0200 Subject: [PATCH] spi: stm32: fix accidential revert to byte-sized transfer splitting MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Commit 6f486556abe35 ("spi: stm32: renaming of spi_master into spi_controller") included an accidential reverted of a change added in commit 1e4929112507f ("spi: stm32: split large transfers based on word size instead of bytes"). This breaks large SPI transfers with word sizes > 8 bits, which are e.g. common when driving MIPI DBI displays. Fix this by using `spi_split_transfers_maxwords()` instead of `spi_split_transfers_maxsize()`. Fixes: 6f486556abe35 ("spi: stm32: renaming of spi_master into spi_controller") Signed-off-by: Leonard Göhrs Link: https://lore.kernel.org/r/20230816145237.3159817-1-l.goehrs@pengutronix.de Signed-off-by: Mark Brown --- drivers/spi/spi-stm32.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 6d10fa4ab7839..7ddf9db776b06 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -1001,9 +1001,9 @@ static int stm32_spi_prepare_msg(struct spi_controller *ctrl, if (spi->cfg->set_number_of_data) { int ret; - ret = spi_split_transfers_maxsize(ctrl, msg, - STM32H7_SPI_TSIZE_MAX, - GFP_KERNEL | GFP_DMA); + ret = spi_split_transfers_maxwords(ctrl, msg, + STM32H7_SPI_TSIZE_MAX, + GFP_KERNEL | GFP_DMA); if (ret) return ret; } -- 2.30.2