[PATCH 3.16 008/125] USB: OHCI: fix bugs in debug routines

Greg Kroah-Hartman
2014-09-03T23:13:50Z

From: Alan Stern <stern@rowland.harvard.edu>

commit 256dbcd80f1ccf8abf421c1d72ba79a4e29941dd upstream.

The debug routine fill_async_buffer() in ohci-hcd is buggy: It never
produces any output because it forgets to initialize the output buffer
size. Also, the debug routine ohci_dump() has an unused argument.

This patch adds the correct initialization and removes the unused
argument.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/host/ohci-dbg.c | 9 +++++----
drivers/usb/host/ohci-hcd.c | 10 +++++-----
2 files changed, 10 insertions(+), 9 deletions(-)

--- a/drivers/usb/host/ohci-dbg.c
+++ b/drivers/usb/host/ohci-dbg.c
@@ -236,7 +236,7 @@ ohci_dump_roothub (
}
}

-static void ohci_dump (struct ohci_hcd *controller, int verbose)
+static void ohci_dump(struct ohci_hcd *controller)
{
ohci_dbg (controller, "OHCI controller state\n");

@@ -464,15 +464,16 @@ show_list (struct ohci_hcd *ohci, char *
static ssize_t fill_async_buffer(struct debug_buffer *buf)
{
struct ohci_hcd *ohci;
- size_t temp;
+ size_t temp, size;
unsigned long flags;

ohci = buf->ohci;
+ size = PAGE_SIZE;

/* display control and bulk lists together, for simplicity */
spin_lock_irqsave (&ohci->lock, flags);
- temp = show_list(ohci, buf->page, buf->count, ohci->ed_controltail);
- temp += show_list(ohci, buf->page + temp, buf->count - temp,
+ temp = show_list(ohci, buf->page, size, ohci->ed_controltail);
+ temp += show_list(ohci, buf->page + temp, size - temp,
ohci->ed_bulktail);
spin_unlock_irqrestore (&ohci->lock, flags);

--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -76,8 +76,8 @@ static const char hcd_name [] = "ohci_hc
#include "ohci.h"
#include "pci-quirks.h"

-static void ohci_dump (struct ohci_hcd *ohci, int verbose);
-static void ohci_stop (struct usb_hcd *hcd);
+static void ohci_dump(struct ohci_hcd *ohci);
+static void ohci_stop(struct usb_hcd *hcd);

#include "ohci-hub.c"
#include "ohci-dbg.c"
@@ -744,7 +744,7 @@ retry:
ohci->ed_to_check = NULL;
}

- ohci_dump (ohci, 1);
+ ohci_dump(ohci);

return 0;
}
@@ -825,7 +825,7 @@ static irqreturn_t ohci_irq (struct usb_
usb_hc_died(hcd);
}

- ohci_dump (ohci, 1);
+ ohci_dump(ohci);
ohci_usb_reset (ohci);
}

@@ -925,7 +925,7 @@ static void ohci_stop (struct usb_hcd *h
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);

- ohci_dump (ohci, 1);
+ ohci_dump(ohci);

if (quirk_nec(ohci))
flush_work(&ohci->nec_work);