[PATCH v2] dmaengine: ti: k3-udma: Deferring probe when soc_device_match() returns NULL

From: Nicolas Frayer
Date: Wed Nov 16 2022 - 09:08:30 EST


When the k3 socinfo driver is built as a module, there is a possibility
that it will probe after the k3 udma driver and the later returns -ENODEV.
By deferring the k3 udma probe we allow the k3 socinfo to probe and
register the soc_device_attribute structure needed by the k3 udma driver.

Signed-off-by: Nicolas Frayer <nfrayer@xxxxxxxxxxxx>
---
v1->v2:
Extracted this patch from the following series:
https://lore.kernel.org/all/20221108181144.433087-1-nfrayer@xxxxxxxxxxxx/

drivers/dma/ti/k3-udma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 7b5081989b3d..a6bb5077900b 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -5285,7 +5285,7 @@ static int udma_probe(struct platform_device *pdev)
soc = soc_device_match(k3_soc_devices);
if (!soc) {
dev_err(dev, "No compatible SoC found\n");
- return -ENODEV;
+ return -EPROBE_DEFER;
}
ud->soc_data = soc->data;

--
2.25.1