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authorAlan Stern <stern@rowland.harvard.edu>2008-10-02 11:48:13 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-10-17 14:41:03 -0700
commit9beeee6584b9aa4f9192055512411484a2a624df (patch)
tree6eec55264d86791a1d4f61bdb9158cf9c720f7ce /drivers/usb/core
parent2b70f07343389cb474235def00b021a645ede916 (diff)
USB: EHCI: log a warning if ehci-hcd is not loaded first
This patch (as1139) adds a warning to the system log whenever ehci-hcd is loaded after ohci-hcd or uhci-hcd. Nowadays most distributions are pretty good about not doing this; maybe the warning will help convince anyone still doing it wrong. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@kernel.org> [2.6.27] Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/hcd.c4
-rw-r--r--drivers/usb/core/hcd.h6
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index c8035a8216b..fc9018e72a0 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -81,6 +81,10 @@
/*-------------------------------------------------------------------------*/
+/* Keep track of which host controller drivers are loaded */
+unsigned long usb_hcds_loaded;
+EXPORT_SYMBOL_GPL(usb_hcds_loaded);
+
/* host controllers we manage */
LIST_HEAD (usb_bus_list);
EXPORT_SYMBOL_GPL (usb_bus_list);
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index e710ce04e22..2dcde61c465 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -482,4 +482,10 @@ static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
*/
extern struct rw_semaphore ehci_cf_port_reset_rwsem;
+/* Keep track of which host controller drivers are loaded */
+#define USB_UHCI_LOADED 0
+#define USB_OHCI_LOADED 1
+#define USB_EHCI_LOADED 2
+extern unsigned long usb_hcds_loaded;
+
#endif /* __KERNEL__ */