[PATCH v2] spi: spi-geni-qcom: correctly handle -EPROBE_DEFER from dma_request_chan()

[Neil Armstrong]

Now spi_geni_grab_gpi_chan() errors are correctly reported, the
-EPROBE_DEFER error should be returned from probe in case the
GPI dma driver is built as module and/or not probed yet.

Fixes: b59c122484ec ("spi: spi-geni-qcom: Add support for GPI dma")
Fixes: 6532582c353f ("spi: spi-geni-qcom: fix error handling in spi_geni_grab_gpi_chan()")
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
---
Changes in v2:
- added braces to second side of the if statement
- Link to v1: https://lore.kernel.org/r/20230615-topic-sm8550-upstream-fix-spi-geni-qcom-probe-v1-1-6da9bf2db4a4@xxxxxxxxxx
---
 drivers/spi/spi-geni-qcom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
index 206cc04bb1ed..26ce959d98df 100644
--- a/drivers/spi/spi-geni-qcom.c
+++ b/drivers/spi/spi-geni-qcom.c
@@ -661,6 +661,8 @@ static int spi_geni_init(struct spi_geni_master *mas)
 			geni_se_select_mode(se, GENI_GPI_DMA);
 			dev_dbg(mas->dev, "Using GPI DMA mode for SPI\n");
 			break;
+		} else if (ret == -EPROBE_DEFER) {
+			goto out_pm;
 		}
 		/*
 		 * in case of failure to get gpi dma channel, we can still do the

---
base-commit: 925294c9aa184801cc0a451b69a18dd0fe7d847d
change-id: 20230615-topic-sm8550-upstream-fix-spi-geni-qcom-probe-9a97cb6b5ea6

Best regards,
-- 
Neil Armstrong <neil.armstrong@xxxxxxxxxx>