HSI: omap_ssi_port: Fix dma_map_sg error check

[ Upstream commit 551e325bbd3fb8b5a686ac1e6cf76e5641461cf2 ]

dma_map_sg return 0 on error, in case of error return -EIO
to caller.

Cc: Sebastian Reichel <sre@kernel.org>
Cc: linux-kernel@vger.kernel.org (open list)
Fixes: b209e047bc74 ("HSI: Introduce OMAP SSI driver")
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c
index a0cb5be..b9495b7 100644 (file)
--- a/drivers/hsi/controllers/omap_ssi_port.c
+++ b/drivers/hsi/controllers/omap_ssi_port.c
@@ -230,10 +230,10 @@ static int ssi_start_dma(struct hsi_msg *msg, int lch)
        if (msg->ttype == HSI_MSG_READ) {
                err = dma_map_sg(&ssi->device, msg->sgt.sgl, msg->sgt.nents,
                                                        DMA_FROM_DEVICE);
-               if (err < 0) {
+               if (!err) {
                        dev_dbg(&ssi->device, "DMA map SG failed !\n");
                        pm_runtime_put_autosuspend(omap_port->pdev);
-                       return err;
+                       return -EIO;
                }
                csdp = SSI_DST_BURST_4x32_BIT | SSI_DST_MEMORY_PORT |
                        SSI_SRC_SINGLE_ACCESS0 | SSI_SRC_PERIPHERAL_PORT |
@@ -247,10 +247,10 @@ static int ssi_start_dma(struct hsi_msg *msg, int lch)
        } else {
                err = dma_map_sg(&ssi->device, msg->sgt.sgl, msg->sgt.nents,
                                                        DMA_TO_DEVICE);
-               if (err < 0) {
+               if (!err) {
                        dev_dbg(&ssi->device, "DMA map SG failed !\n");
                        pm_runtime_put_autosuspend(omap_port->pdev);
-                       return err;
+                       return -EIO;
                }
                csdp = SSI_SRC_BURST_4x32_BIT | SSI_SRC_MEMORY_PORT |
                        SSI_DST_SINGLE_ACCESS0 | SSI_DST_PERIPHERAL_PORT |