[DM/FIXUP] Add ms sleep for link status change

GuEe-GUI · yixinghua121 · commit 2f39ddfd5f1f · 2025-03-13T10:49:23.000+08:00
We should wait a while for success or failure
after link status change or will communicate
fail with the endpoint.

Signed-off-by: GuEe-GUI &lt;2991707448@qq.com&gt;
diff --git a/components/drivers/pci/probe.c b/components/drivers/pci/probe.c
@@ -486,7 +486,7 @@ static void pcie_fixup_link(struct rt_pci_device *pdev)
 
         if (!!(exp_lnksta & PCIEM_LINK_STA_DL_ACTIVE))
         {
-            return;
+            goto _status_sync;
         }
 
         rt_thread_mdelay(10);
@@ -496,6 +496,10 @@ static void pcie_fixup_link(struct rt_pci_device *pdev)
     rt_pci_write_config_u16(pdev, pos + PCIER_LINK_CTL2, exp_lnkctl2);
     rt_pci_write_config_u16(pdev, pos + PCIER_LINK_CTL,
             exp_lnkctl | PCIEM_LINK_CTL_RETRAIN_LINK);
+
+_status_sync:
+    /* Wait a while for success or failure */
+    rt_thread_mdelay(100);
 }
 
 static rt_uint32_t pci_scan_bridge_extend(struct rt_pci_bus *bus, struct rt_pci_device *pdev,

Original file line number	Diff line number	Diff line change
`@@ -486,7 +486,7 @@ static void pcie_fixup_link(struct rt_pci_device *pdev)`
`486`	`486`
`487`	`487`	`if (!!(exp_lnksta & PCIEM_LINK_STA_DL_ACTIVE))`
`488`	`488`	`{`
`489`		`- return;`
	`489`	`+ goto _status_sync;`
`490`	`490`	`}`
`491`	`491`
`492`	`492`	`rt_thread_mdelay(10);`
`@@ -496,6 +496,10 @@ static void pcie_fixup_link(struct rt_pci_device *pdev)`
`496`	`496`	`rt_pci_write_config_u16(pdev, pos + PCIER_LINK_CTL2, exp_lnkctl2);`
`497`	`497`	`rt_pci_write_config_u16(pdev, pos + PCIER_LINK_CTL,`
`498`	`498`	`exp_lnkctl \| PCIEM_LINK_CTL_RETRAIN_LINK);`
	`499`	`+`
	`500`	`+_status_sync:`
	`501`	`+ /* Wait a while for success or failure */`
	`502`	`+ rt_thread_mdelay(100);`
`499`	`503`	`}`
`500`	`504`
`501`	`505`	`static rt_uint32_t pci_scan_bridge_extend(struct rt_pci_bus bus, struct rt_pci_device pdev,`