This is a note to let you know that I've just added the patch titled misc: fastrpc: fix incorrect usage of dma_map_sgtable to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: misc-fastrpc-fix-incorrect-usage-of-dma_map_sgtable.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 21d01b7c329da3aae5ba6e5e02276f8f2d12e0fe Author: Jonathan Marek <jonathan@xxxxxxxx> Date: Mon Feb 8 15:04:01 2021 -0500 misc: fastrpc: fix incorrect usage of dma_map_sgtable [ Upstream commit b212658aebda82f92967bcbd4c7380d607c3d803 ] dma_map_sgtable() returns 0 on success, which is the opposite of what this code was doing. Fixes: 7cd7edb89437 ("misc: fastrpc: fix common struct sg_table related issues") Acked-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> Signed-off-by: Jonathan Marek <jonathan@xxxxxxxx> Link: https://lore.kernel.org/r/20210208200401.31100-1-jonathan@xxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 994ab67bc2dce..815d01f785dff 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -520,12 +520,13 @@ fastrpc_map_dma_buf(struct dma_buf_attachment *attachment, { struct fastrpc_dma_buf_attachment *a = attachment->priv; struct sg_table *table; + int ret; table = &a->sgt; - if (!dma_map_sgtable(attachment->dev, table, dir, 0)) - return ERR_PTR(-ENOMEM); - + ret = dma_map_sgtable(attachment->dev, table, dir, 0); + if (ret) + table = ERR_PTR(ret); return table; }