Re: [PATCH 4.19 182/267] spi: dw: Return any value retrieved from the dma_transfer callback

[Ralph Siemsen]

Hi Sasha,

On Fri, Jun 26, 2020 at 04:07:10PM -0400, Sasha Levin wrote:
> On Fri, Jun 26, 2020 at 11:18:00AM -0400, Ralph Siemsen wrote:
> > So the following patch is needed as well, at least in 4.9 and 4.19, 
> > I did not check/test other versions. Mainline does not need this, 
> > since the code seems to have been refactored to avoid the 
> > duplication.
>
> Could you add your signed-off-by tag please? :)

Whoops, for some reason I snipped it out... sorry about that!
Here it is again, with the commit message tweaked for clarity.

Subject: [PATCH] spi: dw: Fix return value of dma_transfer callback

Earlier commit "spi: dw: Return any value retrieved from the
dma_transfer callback" changed the return code of mid_spi_dma_transfer()
from 0 to 1 in drivers/spi/spi-dw-mid.c.

A similar change is needed spi-dw-mmio.c for mmio_spi_dma_transfer()
function. Note this only applies to older branches, as mainline has
refactored the code to avoid duplication.

Signed-off-by: Ralph Siemsen <ralph.siemsen@xxxxxxxxxx>
---
drivers/spi/spi-dw-mmio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index c563c2815093..99641c485288 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -358,7 +358,7 @@ static int mmio_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer)
		dma_async_issue_pending(dws->txchan);
	}

-	return 0;
+	return 1;
}

static void mmio_spi_dma_stop(struct dw_spi *dws)
--
2.17.1