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authorJan Beulich <JBeulich@suse.com>2012-09-18 15:23:02 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-09-18 20:20:48 +0400
commit9fa5780beea1274d498a224822397100022da7d4 (patch)
tree9dbc2d31f3af70502843bbebe8017828abd63136 /include/linux/usb/ehci_def.h
parentee42f6c9fc62d1d4d45b0d75e5f947e6645d8c30 (diff)
downloadlinux-9fa5780beea1274d498a224822397100022da7d4.tar.xz
USB EHCI/Xen: propagate controller reset information to hypervisor
Just like for the in-tree early console debug port driver, the hypervisor - when using a debug port based console - also needs to be told about controller resets, so it can suppress using and then re-initialize the debug port accordingly. Other than the in-tree driver, the hypervisor driver actually cares about doing this only for the device where the debug is port actually in use, i.e. it needs to be told the coordinates of the device being reset (quite obviously, leveraging the addition done for that would likely benefit the in-tree driver too). Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb/ehci_def.h')
-rw-r--r--include/linux/usb/ehci_def.h29
1 files changed, 23 insertions, 6 deletions
diff --git a/include/linux/usb/ehci_def.h b/include/linux/usb/ehci_def.h
index de4b9ed5d5dd..9a446302b658 100644
--- a/include/linux/usb/ehci_def.h
+++ b/include/linux/usb/ehci_def.h
@@ -221,18 +221,35 @@ extern int __init early_dbgp_init(char *s);
extern struct console early_dbgp_console;
#endif /* CONFIG_EARLY_PRINTK_DBGP */
+struct usb_hcd;
+
+#ifdef CONFIG_XEN_DOM0
+extern int xen_dbgp_reset_prep(struct usb_hcd *);
+extern int xen_dbgp_external_startup(struct usb_hcd *);
+#else
+static inline int xen_dbgp_reset_prep(struct usb_hcd *hcd)
+{
+ return 1; /* Shouldn't this be 0? */
+}
+
+static inline int xen_dbgp_external_startup(struct usb_hcd *hcd)
+{
+ return -1;
+}
+#endif
+
#ifdef CONFIG_EARLY_PRINTK_DBGP
/* Call backs from ehci host driver to ehci debug driver */
-extern int dbgp_external_startup(void);
-extern int dbgp_reset_prep(void);
+extern int dbgp_external_startup(struct usb_hcd *);
+extern int dbgp_reset_prep(struct usb_hcd *hcd);
#else
-static inline int dbgp_reset_prep(void)
+static inline int dbgp_reset_prep(struct usb_hcd *hcd)
{
- return 1;
+ return xen_dbgp_reset_prep(hcd);
}
-static inline int dbgp_external_startup(void)
+static inline int dbgp_external_startup(struct usb_hcd *hcd)
{
- return -1;
+ return xen_dbgp_external_startup(hcd);
}
#endif