diff mbox series

[6.1.y-cip,07/16] spi: rpc-if: differentiate between unsupported and invalid requests

Message ID 20241206091122.67133-8-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State New
Headers show
Series Add RPC-IF support for RZ/G2UL SoC | expand

Commit Message

Prabhakar Dec. 6, 2024, 9:11 a.m. UTC 
From: Miquel Raynal <miquel.raynal@bootlin.com>

commit 615725a9a8c8aa0976a1469b88a1e5d696e25eb0 upstream.

If the request is out of range, returning -EINVAL seems a better pick
than -ENOTSUPP.

>From a caller (and reviewer) point of view, distinguising between the
two may be helpful because somehow one can be "fixed" while the other
will always be refused no matter how hard we try.

As part of a wider work to bring spi-nand continuous reads, it was
useful to easily catch the upper limit direct mapping boundaries for
each controller, with the idea of enlarging this area from a page to an
eraseblock, without risking too many regressions.

In all other cases, as part of a wider work towards using -EOPNOTSUP
rather than -ENOTSUPP (which is not a SUSV4 code), let's change the
error code to be uniform across spi-mem controller drivers.

Finally, reword a little bit the conditions to clarify what is intended
(ie. checking for the presence of a direct mapping, and also ensuring we
create a dirmap only on DATA_IN flows).

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://msgid.link/r/20240522145255.995778-4-miquel.raynal@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/spi/spi-rpc-if.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-rpc-if.c b/drivers/spi/spi-rpc-if.c
index 24ec1c83f379..5467e917d9ff 100644
--- a/drivers/spi/spi-rpc-if.c
+++ b/drivers/spi/spi-rpc-if.c
@@ -95,16 +95,16 @@  static int rpcif_spi_mem_dirmap_create(struct spi_mem_dirmap_desc *desc)
 		spi_controller_get_devdata(desc->mem->spi->controller);
 
 	if (desc->info.offset + desc->info.length > U32_MAX)
-		return -ENOTSUPP;
+		return -EINVAL;
 
 	if (!rpcif_spi_mem_supports_op(desc->mem, &desc->info.op_tmpl))
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 
-	if (!rpc->dirmap && desc->info.op_tmpl.data.dir == SPI_MEM_DATA_IN)
-		return -ENOTSUPP;
+	if (!rpc->dirmap)
+		return -EOPNOTSUPP;
 
-	if (desc->info.op_tmpl.data.dir == SPI_MEM_DATA_OUT)
-		return -ENOTSUPP;
+	if (desc->info.op_tmpl.data.dir != SPI_MEM_DATA_IN)
+		return -EOPNOTSUPP;
 
 	return 0;
 }