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authorXenia Ragiadakou <burzalodowa@gmail.com>2013-08-06 00:22:15 +0300
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2013-08-13 16:05:38 -0700
commit84a99f6fc5d4a2b7583aa287979268a8bb926367 (patch)
tree0d4e1cb4d144b69f58b08bf0494329f90b777a71 /drivers/usb/host/xhci.h
parentb2497509df002e9a09c8550cd0ecd2f77c9640d8 (diff)
xhci: add traces for debug messages in xhci_address_device()
This patch declares an event class for trace events that trace messages with variadic arguments, called xhci_log_msg, and defines a trace event for tracing the debug messages in xhci_address_device() function, called xhci_dbg_address. In order to implement this type of trace events, a wrapper function, called xhci_dbg_trace(), was created that records the format string and variadic arguments into a va_format structure which is passed as argument to the tracepoints of the class xhci_log_msg. All the xhci_dbg() calls in xhci_address_device() are replaced with calls to xhci_dbg_trace(). The functionality of xhci_dbg() log messages was not removed though, but it is placed inside xhci_dbg_trace(). This trace event aims to give the ability to the user or the developper to isolate and trace the debug messages generated when an Address Device Command is issued to xHC. Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/host/xhci.h')
-rw-r--r--drivers/usb/host/xhci.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 4d43531f5fcf..d2045916531b 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1647,6 +1647,8 @@ char *xhci_get_slot_state(struct xhci_hcd *xhci,
void xhci_dbg_ep_rings(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
struct xhci_virt_ep *ep);
+void xhci_dbg_trace(struct xhci_hcd *xhci, void (*trace)(struct va_format *),
+ const char *fmt, ...);
/* xHCI memory management */
void xhci_mem_cleanup(struct xhci_hcd *xhci);