From: Murali Karicheri <m-karicheri2@ti.com>
Date: Tue, 17 Apr 2018 21:30:40 +0000 (-0400)
Subject: net: netcp: support probe deferral
X-Git-Tag: pci-v4.18-changes-2~10^2~440^2~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=21f706bb10cf7d905d89ceb3f689b8b844520127;p=users%2Fdwmw2%2Flinux.git

net: netcp: support probe deferral

The netcp driver shouldn't proceed until the knav qmss and dma
devices are ready. So return -EPROBE_DEFER if these devices are not
ready.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/ti/netcp_core.c b/drivers/net/ethernet/ti/netcp_core.c
index 9c51b25d7fd07..736f6f713c093 100644
--- a/drivers/net/ethernet/ti/netcp_core.c
+++ b/drivers/net/ethernet/ti/netcp_core.c
@@ -2158,6 +2158,10 @@ static int netcp_probe(struct platform_device *pdev)
 	struct netcp_module *module;
 	int ret;
 
+	if (!knav_dma_device_ready() ||
+	    !knav_qmss_device_ready())
+		return -EPROBE_DEFER;
+
 	if (!node) {
 		dev_err(dev, "could not find device info\n");
 		return -ENODEV;