From 12e72feab5d9a23107f245b0f241a2484cbb5a4e Mon Sep 17 00:00:00 2001
From: Pete Zaitcev <zaitcev@redhat.com>
Date: Fri, 9 Jun 2006 22:03:32 -0700
Subject: [PATCH] [PATCH] USB: implement error event in usbmon
Implement the "error" event in usbmon.
Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/mon/mon_main.c | 20 ++++++++++++++++----
drivers/usb/mon/mon_text.c | 27 +++++++++++++++++++++++++++
drivers/usb/mon/usb_mon.h | 1 +
3 files changed, 44 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/mon/mon_main.c b/drivers/usb/mon/mon_main.c
index 86db92b4915b55..275a66f8305878 100644
--- a/drivers/usb/mon/mon_main.c
+++ b/drivers/usb/mon/mon_main.c
@@ -114,20 +114,32 @@ out_unlocked:
/*
*/
-static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int err)
+static void mon_submit_error(struct usb_bus *ubus, struct urb *urb, int error)
{
struct mon_bus *mbus;
+ unsigned long flags;
+ struct list_head *pos;
+ struct mon_reader *r;
mbus = ubus->mon_bus;
if (mbus == NULL)
goto out_unlocked;
- /*
- * XXX Capture the error code and the 'E' event.
- */
+ spin_lock_irqsave(&mbus->lock, flags);
+ if (mbus->nreaders == 0)
+ goto out_locked;
+ mbus->cnt_events++;
+ list_for_each (pos, &mbus->r_list) {
+ r = list_entry(pos, struct mon_reader, r_link);
+ r->rnf_error(r->r_data, urb, error);
+ }
+
+ spin_unlock_irqrestore(&mbus->lock, flags);
return;
+out_locked:
+ spin_unlock_irqrestore(&mbus->lock, flags);
out_unlocked:
return;
}
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index 9f9236bf62d241..e02c1a30c4cd4d 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -182,6 +182,32 @@ static void mon_text_complete(void *data, struct urb *urb)
mon_text_event(rp, urb, 'C');
}
+static void mon_text_error(void *data, struct urb *urb, int error)
+{
+ struct mon_reader_text *rp = data;
+ struct mon_event_text *ep;
+
+ if (rp->nevents >= EVENT_MAX ||
+ (ep = kmem_cache_alloc(rp->e_slab, SLAB_ATOMIC)) == NULL) {
+ rp->r.m_bus->cnt_text_lost++;
+ return;
+ }
+
+ ep->type = 'E';
+ ep->pipe = urb->pipe;
+ ep->id = (unsigned long) urb;
+ ep->tstamp = 0;
+ ep->length = 0;
+ ep->status = error;
+
+ ep->setup_flag = '-';
+ ep->data_flag = 'E';
+
+ rp->nevents++;
+ list_add_tail(&ep->e_link, &rp->e_list);
+ wake_up(&rp->wait);
+}
+
/*
* Fetch next event from the circular buffer.
*/
@@ -235,6 +261,7 @@ static int mon_text_open(struct inode *inode, struct file *file)
rp->r.m_bus = mbus;
rp->r.r_data = rp;
rp->r.rnf_submit = mon_text_submit;
+ rp->r.rnf_error = mon_text_error;
rp->r.rnf_complete = mon_text_complete;
snprintf(rp->slab_name, SLAB_NAME_SZ, "mon%dt_%lx", ubus->busnum,
diff --git a/drivers/usb/mon/usb_mon.h b/drivers/usb/mon/usb_mon.h
index 92702835b1e5b8..33678c24ebeed5 100644
--- a/drivers/usb/mon/usb_mon.h
+++ b/drivers/usb/mon/usb_mon.h
@@ -40,6 +40,7 @@ struct mon_reader {
void *r_data; /* Use container_of instead? */
void (*rnf_submit)(void *data, struct urb *urb);
+ void (*rnf_error)(void *data, struct urb *urb, int error);
void (*rnf_complete)(void *data, struct urb *urb);
};
--
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