We already maintain a list of USB host controllers, so we can use that
to implement a generic detect callback. Currently, all drivers define
their own, which uses driver-specific means to arrive at the struct
usb_host and then call usb_host_detect().

Signed-off-by: Ahmad Fatoum <[email protected]>
---
 drivers/usb/core/usb.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index ea244d4bcf6c..938a28e030bf 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -88,11 +88,25 @@ static inline void usb_host_release(struct usb_host *host)
        slice_release(&host->slice);
 }
 
+static int usb_hw_detect(struct device_d *dev)
+{
+       struct usb_host *host;
+
+       list_for_each_entry(host, &host_list, list) {
+               if (dev == host->hw_dev)
+                       return usb_host_detect(host);
+       }
+
+       return -ENODEV;
+}
+
 int usb_register_host(struct usb_host *host)
 {
        list_add_tail(&host->list, &host_list);
        host->busnum = host_busnum++;
        slice_init(&host->slice, dev_name(host->hw_dev));
+       if (!host->hw_dev->detect)
+               host->hw_dev->detect = usb_hw_detect;
        return 0;
 }
 
-- 
2.30.0


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