5.4-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Fourier fourier.thomas@gmail.com
commit ff09b71bf9daeca4f21d6e5e449641c9fad75b53 upstream.
The dma_unmap_sg() functions should be called with the same nents as the dma_map_sg(), not the value the map function returned.
Fixes: 2f5da678351f ("mmc: bcm2835: Properly handle dmaengine_prep_slave_sg") Signed-off-by: Thomas Fourier fourier.thomas@gmail.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250630093510.82871-2-fourier.thomas@gmail.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/host/bcm2835.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/mmc/host/bcm2835.c +++ b/drivers/mmc/host/bcm2835.c @@ -507,7 +507,8 @@ void bcm2835_prepare_dma(struct bcm2835_ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) { - dma_unmap_sg(dma_chan->device->dev, data->sg, sg_len, dir_data); + dma_unmap_sg(dma_chan->device->dev, data->sg, data->sg_len, + dir_data); return; }