linux/drivers/usb/host/ohci-dbg.c
Greg Kroah-Hartman d0d6bc89b6 USB: ohci-dbg.c: move assignment out of if () block
We should not be doing assignments within an if () block
so fix up the code to not do this.

change was created using Coccinelle.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Felipe Balbi <balbi@ti.com>
2015-05-10 16:01:11 +02:00

812 lines
20 KiB
C

/*
* OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
*
* This file is licenced under the GPL.
*/
/*-------------------------------------------------------------------------*/
#define edstring(ed_type) ({ char *temp; \
switch (ed_type) { \
case PIPE_CONTROL: temp = "ctrl"; break; \
case PIPE_BULK: temp = "bulk"; break; \
case PIPE_INTERRUPT: temp = "intr"; break; \
default: temp = "isoc"; break; \
} temp;})
#define pipestring(pipe) edstring(usb_pipetype(pipe))
#define ohci_dbg_sw(ohci, next, size, format, arg...) \
do { \
if (next != NULL) { \
unsigned s_len; \
s_len = scnprintf (*next, *size, format, ## arg ); \
*size -= s_len; *next += s_len; \
} else \
ohci_dbg(ohci,format, ## arg ); \
} while (0);
/* Version for use where "next" is the address of a local variable */
#define ohci_dbg_nosw(ohci, next, size, format, arg...) \
do { \
unsigned s_len; \
s_len = scnprintf(*next, *size, format, ## arg); \
*size -= s_len; *next += s_len; \
} while (0);
static void ohci_dump_intr_mask (
struct ohci_hcd *ohci,
char *label,
u32 mask,
char **next,
unsigned *size)
{
ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n",
label,
mask,
(mask & OHCI_INTR_MIE) ? " MIE" : "",
(mask & OHCI_INTR_OC) ? " OC" : "",
(mask & OHCI_INTR_RHSC) ? " RHSC" : "",
(mask & OHCI_INTR_FNO) ? " FNO" : "",
(mask & OHCI_INTR_UE) ? " UE" : "",
(mask & OHCI_INTR_RD) ? " RD" : "",
(mask & OHCI_INTR_SF) ? " SF" : "",
(mask & OHCI_INTR_WDH) ? " WDH" : "",
(mask & OHCI_INTR_SO) ? " SO" : ""
);
}
static void maybe_print_eds (
struct ohci_hcd *ohci,
char *label,
u32 value,
char **next,
unsigned *size)
{
if (value)
ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value);
}
static char *hcfs2string (int state)
{
switch (state) {
case OHCI_USB_RESET: return "reset";
case OHCI_USB_RESUME: return "resume";
case OHCI_USB_OPER: return "operational";
case OHCI_USB_SUSPEND: return "suspend";
}
return "?";
}
static const char *rh_state_string(struct ohci_hcd *ohci)
{
switch (ohci->rh_state) {
case OHCI_RH_HALTED:
return "halted";
case OHCI_RH_SUSPENDED:
return "suspended";
case OHCI_RH_RUNNING:
return "running";
}
return "?";
}
// dump control and status registers
static void
ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size)
{
struct ohci_regs __iomem *regs = controller->regs;
u32 temp;
temp = ohci_readl (controller, &regs->revision) & 0xff;
ohci_dbg_sw (controller, next, size,
"OHCI %d.%d, %s legacy support registers, rh state %s\n",
0x03 & (temp >> 4), (temp & 0x0f),
(temp & 0x0100) ? "with" : "NO",
rh_state_string(controller));
temp = ohci_readl (controller, &regs->control);
ohci_dbg_sw (controller, next, size,
"control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n",
temp,
(temp & OHCI_CTRL_RWE) ? " RWE" : "",
(temp & OHCI_CTRL_RWC) ? " RWC" : "",
(temp & OHCI_CTRL_IR) ? " IR" : "",
hcfs2string (temp & OHCI_CTRL_HCFS),
(temp & OHCI_CTRL_BLE) ? " BLE" : "",
(temp & OHCI_CTRL_CLE) ? " CLE" : "",
(temp & OHCI_CTRL_IE) ? " IE" : "",
(temp & OHCI_CTRL_PLE) ? " PLE" : "",
temp & OHCI_CTRL_CBSR
);
temp = ohci_readl (controller, &regs->cmdstatus);
ohci_dbg_sw (controller, next, size,
"cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp,
(temp & OHCI_SOC) >> 16,
(temp & OHCI_OCR) ? " OCR" : "",
(temp & OHCI_BLF) ? " BLF" : "",
(temp & OHCI_CLF) ? " CLF" : "",
(temp & OHCI_HCR) ? " HCR" : ""
);
ohci_dump_intr_mask (controller, "intrstatus",
ohci_readl (controller, &regs->intrstatus),
next, size);
ohci_dump_intr_mask (controller, "intrenable",
ohci_readl (controller, &regs->intrenable),
next, size);
// intrdisable always same as intrenable
maybe_print_eds (controller, "ed_periodcurrent",
ohci_readl (controller, &regs->ed_periodcurrent),
next, size);
maybe_print_eds (controller, "ed_controlhead",
ohci_readl (controller, &regs->ed_controlhead),
next, size);
maybe_print_eds (controller, "ed_controlcurrent",
ohci_readl (controller, &regs->ed_controlcurrent),
next, size);
maybe_print_eds (controller, "ed_bulkhead",
ohci_readl (controller, &regs->ed_bulkhead),
next, size);
maybe_print_eds (controller, "ed_bulkcurrent",
ohci_readl (controller, &regs->ed_bulkcurrent),
next, size);
maybe_print_eds (controller, "donehead",
ohci_readl (controller, &regs->donehead), next, size);
}
#define dbg_port_sw(hc,num,value,next,size) \
ohci_dbg_sw (hc, next, size, \
"roothub.portstatus [%d] " \
"0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
num, temp, \
(temp & RH_PS_PRSC) ? " PRSC" : "", \
(temp & RH_PS_OCIC) ? " OCIC" : "", \
(temp & RH_PS_PSSC) ? " PSSC" : "", \
(temp & RH_PS_PESC) ? " PESC" : "", \
(temp & RH_PS_CSC) ? " CSC" : "", \
\
(temp & RH_PS_LSDA) ? " LSDA" : "", \
(temp & RH_PS_PPS) ? " PPS" : "", \
(temp & RH_PS_PRS) ? " PRS" : "", \
(temp & RH_PS_POCI) ? " POCI" : "", \
(temp & RH_PS_PSS) ? " PSS" : "", \
\
(temp & RH_PS_PES) ? " PES" : "", \
(temp & RH_PS_CCS) ? " CCS" : "" \
);
static void
ohci_dump_roothub (
struct ohci_hcd *controller,
int verbose,
char **next,
unsigned *size)
{
u32 temp, i;
temp = roothub_a (controller);
if (temp == ~(u32)0)
return;
if (verbose) {
ohci_dbg_sw (controller, next, size,
"roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp,
((temp & RH_A_POTPGT) >> 24) & 0xff,
(temp & RH_A_NOCP) ? " NOCP" : "",
(temp & RH_A_OCPM) ? " OCPM" : "",
(temp & RH_A_DT) ? " DT" : "",
(temp & RH_A_NPS) ? " NPS" : "",
(temp & RH_A_PSM) ? " PSM" : "",
(temp & RH_A_NDP), controller->num_ports
);
temp = roothub_b (controller);
ohci_dbg_sw (controller, next, size,
"roothub.b %08x PPCM=%04x DR=%04x\n",
temp,
(temp & RH_B_PPCM) >> 16,
(temp & RH_B_DR)
);
temp = roothub_status (controller);
ohci_dbg_sw (controller, next, size,
"roothub.status %08x%s%s%s%s%s%s\n",
temp,
(temp & RH_HS_CRWE) ? " CRWE" : "",
(temp & RH_HS_OCIC) ? " OCIC" : "",
(temp & RH_HS_LPSC) ? " LPSC" : "",
(temp & RH_HS_DRWE) ? " DRWE" : "",
(temp & RH_HS_OCI) ? " OCI" : "",
(temp & RH_HS_LPS) ? " LPS" : ""
);
}
for (i = 0; i < controller->num_ports; i++) {
temp = roothub_portstatus (controller, i);
dbg_port_sw (controller, i, temp, next, size);
}
}
static void ohci_dump(struct ohci_hcd *controller)
{
ohci_dbg (controller, "OHCI controller state\n");
// dumps some of the state we know about
ohci_dump_status (controller, NULL, NULL);
if (controller->hcca)
ohci_dbg (controller,
"hcca frame #%04x\n", ohci_frame_no(controller));
ohci_dump_roothub (controller, 1, NULL, NULL);
}
static const char data0 [] = "DATA0";
static const char data1 [] = "DATA1";
static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label,
const struct td *td)
{
u32 tmp = hc32_to_cpup (ohci, &td->hwINFO);
ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n",
label, td,
(tmp & TD_DONE) ? " (DONE)" : "",
td->urb, td->index,
hc32_to_cpup (ohci, &td->hwNextTD));
if ((tmp & TD_ISO) == 0) {
const char *toggle, *pid;
u32 cbp, be;
switch (tmp & TD_T) {
case TD_T_DATA0: toggle = data0; break;
case TD_T_DATA1: toggle = data1; break;
case TD_T_TOGGLE: toggle = "(CARRY)"; break;
default: toggle = "(?)"; break;
}
switch (tmp & TD_DP) {
case TD_DP_SETUP: pid = "SETUP"; break;
case TD_DP_IN: pid = "IN"; break;
case TD_DP_OUT: pid = "OUT"; break;
default: pid = "(bad pid)"; break;
}
ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp,
TD_CC_GET(tmp), /* EC, */ toggle,
(tmp & TD_DI) >> 21, pid,
(tmp & TD_R) ? "R" : "");
cbp = hc32_to_cpup (ohci, &td->hwCBP);
be = hc32_to_cpup (ohci, &td->hwBE);
ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be,
cbp ? (be + 1 - cbp) : 0);
} else {
unsigned i;
ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp,
TD_CC_GET(tmp),
(tmp >> 24) & 0x07,
(tmp & TD_DI) >> 21,
tmp & 0x0000ffff);
ohci_dbg (ohci, " bp0 %08x be %08x\n",
hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff,
hc32_to_cpup (ohci, &td->hwBE));
for (i = 0; i < MAXPSW; i++) {
u16 psw = ohci_hwPSW (ohci, td, i);
int cc = (psw >> 12) & 0x0f;
ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i,
psw, cc,
(cc >= 0x0e) ? "OFFSET" : "SIZE",
psw & 0x0fff);
}
}
}
/* caller MUST own hcd spinlock if verbose is set! */
static void __maybe_unused
ohci_dump_ed (const struct ohci_hcd *ohci, const char *label,
const struct ed *ed, int verbose)
{
u32 tmp = hc32_to_cpu (ohci, ed->hwINFO);
char *type = "";
ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n",
label,
ed, ed->state, edstring (ed->type),
hc32_to_cpup (ohci, &ed->hwNextED));
switch (tmp & (ED_IN|ED_OUT)) {
case ED_OUT: type = "-OUT"; break;
case ED_IN: type = "-IN"; break;
/* else from TDs ... control */
}
ohci_dbg (ohci,
" info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp,
0x03ff & (tmp >> 16),
(tmp & ED_DEQUEUE) ? " DQ" : "",
(tmp & ED_ISO) ? " ISO" : "",
(tmp & ED_SKIP) ? " SKIP" : "",
(tmp & ED_LOWSPEED) ? " LOW" : "",
0x000f & (tmp >> 7),
type,
0x007f & tmp);
tmp = hc32_to_cpup (ohci, &ed->hwHeadP);
ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n",
tmp,
(tmp & ED_C) ? data1 : data0,
(tmp & ED_H) ? " HALT" : "",
hc32_to_cpup (ohci, &ed->hwTailP),
verbose ? "" : " (not listing)");
if (verbose) {
struct list_head *tmp;
/* use ed->td_list because HC concurrently modifies
* hwNextTD as it accumulates ed_donelist.
*/
list_for_each (tmp, &ed->td_list) {
struct td *td;
td = list_entry (tmp, struct td, td_list);
ohci_dump_td (ohci, " ->", td);
}
}
}
/*-------------------------------------------------------------------------*/
static int debug_async_open(struct inode *, struct file *);
static int debug_periodic_open(struct inode *, struct file *);
static int debug_registers_open(struct inode *, struct file *);
static int debug_async_open(struct inode *, struct file *);
static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
static int debug_close(struct inode *, struct file *);
static const struct file_operations debug_async_fops = {
.owner = THIS_MODULE,
.open = debug_async_open,
.read = debug_output,
.release = debug_close,
.llseek = default_llseek,
};
static const struct file_operations debug_periodic_fops = {
.owner = THIS_MODULE,
.open = debug_periodic_open,
.read = debug_output,
.release = debug_close,
.llseek = default_llseek,
};
static const struct file_operations debug_registers_fops = {
.owner = THIS_MODULE,
.open = debug_registers_open,
.read = debug_output,
.release = debug_close,
.llseek = default_llseek,
};
static struct dentry *ohci_debug_root;
struct debug_buffer {
ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
struct ohci_hcd *ohci;
struct mutex mutex; /* protect filling of buffer */
size_t count; /* number of characters filled into buffer */
char *page;
};
static ssize_t
show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed)
{
unsigned temp, size = count;
if (!ed)
return 0;
/* print first --> last */
while (ed->ed_prev)
ed = ed->ed_prev;
/* dump a snapshot of the bulk or control schedule */
while (ed) {
u32 info = hc32_to_cpu (ohci, ed->hwINFO);
u32 headp = hc32_to_cpu (ohci, ed->hwHeadP);
struct list_head *entry;
struct td *td;
temp = scnprintf (buf, size,
"ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s",
ed,
(info & ED_LOWSPEED) ? 'l' : 'f',
info & 0x7f,
(info >> 7) & 0xf,
(info & ED_IN) ? "in" : "out",
0x03ff & (info >> 16),
info,
(info & ED_SKIP) ? " s" : "",
(headp & ED_H) ? " H" : "",
(headp & ED_C) ? data1 : data0);
size -= temp;
buf += temp;
list_for_each (entry, &ed->td_list) {
u32 cbp, be;
td = list_entry (entry, struct td, td_list);
info = hc32_to_cpup (ohci, &td->hwINFO);
cbp = hc32_to_cpup (ohci, &td->hwCBP);
be = hc32_to_cpup (ohci, &td->hwBE);
temp = scnprintf (buf, size,
"\n\ttd %p %s %d cc=%x urb %p (%08x)",
td,
({ char *pid;
switch (info & TD_DP) {
case TD_DP_SETUP: pid = "setup"; break;
case TD_DP_IN: pid = "in"; break;
case TD_DP_OUT: pid = "out"; break;
default: pid = "(?)"; break;
} pid;}),
cbp ? (be + 1 - cbp) : 0,
TD_CC_GET (info), td->urb, info);
size -= temp;
buf += temp;
}
temp = scnprintf (buf, size, "\n");
size -= temp;
buf += temp;
ed = ed->ed_next;
}
return count - size;
}
static ssize_t fill_async_buffer(struct debug_buffer *buf)
{
struct ohci_hcd *ohci;
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, size, ohci->ed_controltail);
temp += show_list(ohci, buf->page + temp, size - temp,
ohci->ed_bulktail);
spin_unlock_irqrestore (&ohci->lock, flags);
return temp;
}
#define DBG_SCHED_LIMIT 64
static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
{
struct ohci_hcd *ohci;
struct ed **seen, *ed;
unsigned long flags;
unsigned temp, size, seen_count;
char *next;
unsigned i;
seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC);
if (!seen)
return 0;
seen_count = 0;
ohci = buf->ohci;
next = buf->page;
size = PAGE_SIZE;
temp = scnprintf (next, size, "size = %d\n", NUM_INTS);
size -= temp;
next += temp;
/* dump a snapshot of the periodic schedule (and load) */
spin_lock_irqsave (&ohci->lock, flags);
for (i = 0; i < NUM_INTS; i++) {
ed = ohci->periodic[i];
if (!ed)
continue;
temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]);
size -= temp;
next += temp;
do {
temp = scnprintf (next, size, " ed%d/%p",
ed->interval, ed);
size -= temp;
next += temp;
for (temp = 0; temp < seen_count; temp++) {
if (seen [temp] == ed)
break;
}
/* show more info the first time around */
if (temp == seen_count) {
u32 info = hc32_to_cpu (ohci, ed->hwINFO);
struct list_head *entry;
unsigned qlen = 0;
/* qlen measured here in TDs, not urbs */
list_for_each (entry, &ed->td_list)
qlen++;
temp = scnprintf (next, size,
" (%cs dev%d ep%d%s-%s qlen %u"
" max %d %08x%s%s)",
(info & ED_LOWSPEED) ? 'l' : 'f',
info & 0x7f,
(info >> 7) & 0xf,
(info & ED_IN) ? "in" : "out",
(info & ED_ISO) ? "iso" : "int",
qlen,
0x03ff & (info >> 16),
info,
(info & ED_SKIP) ? " K" : "",
(ed->hwHeadP &
cpu_to_hc32(ohci, ED_H)) ?
" H" : "");
size -= temp;
next += temp;
if (seen_count < DBG_SCHED_LIMIT)
seen [seen_count++] = ed;
ed = ed->ed_next;
} else {
/* we've seen it and what's after */
temp = 0;
ed = NULL;
}
} while (ed);
temp = scnprintf (next, size, "\n");
size -= temp;
next += temp;
}
spin_unlock_irqrestore (&ohci->lock, flags);
kfree (seen);
return PAGE_SIZE - size;
}
#undef DBG_SCHED_LIMIT
static ssize_t fill_registers_buffer(struct debug_buffer *buf)
{
struct usb_hcd *hcd;
struct ohci_hcd *ohci;
struct ohci_regs __iomem *regs;
unsigned long flags;
unsigned temp, size;
char *next;
u32 rdata;
ohci = buf->ohci;
hcd = ohci_to_hcd(ohci);
regs = ohci->regs;
next = buf->page;
size = PAGE_SIZE;
spin_lock_irqsave (&ohci->lock, flags);
/* dump driver info, then registers in spec order */
ohci_dbg_nosw(ohci, &next, &size,
"bus %s, device %s\n"
"%s\n"
"%s\n",
hcd->self.controller->bus->name,
dev_name(hcd->self.controller),
hcd->product_desc,
hcd_name);
if (!HCD_HW_ACCESSIBLE(hcd)) {
size -= scnprintf (next, size,
"SUSPENDED (no register access)\n");
goto done;
}
ohci_dump_status(ohci, &next, &size);
/* hcca */
if (ohci->hcca)
ohci_dbg_nosw(ohci, &next, &size,
"hcca frame 0x%04x\n", ohci_frame_no(ohci));
/* other registers mostly affect frame timings */
rdata = ohci_readl (ohci, &regs->fminterval);
temp = scnprintf (next, size,
"fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n",
rdata, (rdata >> 31) ? "FIT " : "",
(rdata >> 16) & 0xefff, rdata & 0xffff);
size -= temp;
next += temp;
rdata = ohci_readl (ohci, &regs->fmremaining);
temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n",
rdata, (rdata >> 31) ? "FRT " : "",
rdata & 0x3fff);
size -= temp;
next += temp;
rdata = ohci_readl (ohci, &regs->periodicstart);
temp = scnprintf (next, size, "periodicstart 0x%04x\n",
rdata & 0x3fff);
size -= temp;
next += temp;
rdata = ohci_readl (ohci, &regs->lsthresh);
temp = scnprintf (next, size, "lsthresh 0x%04x\n",
rdata & 0x3fff);
size -= temp;
next += temp;
temp = scnprintf (next, size, "hub poll timer %s\n",
HCD_POLL_RH(ohci_to_hcd(ohci)) ? "ON" : "off");
size -= temp;
next += temp;
/* roothub */
ohci_dump_roothub (ohci, 1, &next, &size);
done:
spin_unlock_irqrestore (&ohci->lock, flags);
return PAGE_SIZE - size;
}
static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci,
ssize_t (*fill_func)(struct debug_buffer *))
{
struct debug_buffer *buf;
buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
if (buf) {
buf->ohci = ohci;
buf->fill_func = fill_func;
mutex_init(&buf->mutex);
}
return buf;
}
static int fill_buffer(struct debug_buffer *buf)
{
int ret = 0;
if (!buf->page)
buf->page = (char *)get_zeroed_page(GFP_KERNEL);
if (!buf->page) {
ret = -ENOMEM;
goto out;
}
ret = buf->fill_func(buf);
if (ret >= 0) {
buf->count = ret;
ret = 0;
}
out:
return ret;
}
static ssize_t debug_output(struct file *file, char __user *user_buf,
size_t len, loff_t *offset)
{
struct debug_buffer *buf = file->private_data;
int ret = 0;
mutex_lock(&buf->mutex);
if (buf->count == 0) {
ret = fill_buffer(buf);
if (ret != 0) {
mutex_unlock(&buf->mutex);
goto out;
}
}
mutex_unlock(&buf->mutex);
ret = simple_read_from_buffer(user_buf, len, offset,
buf->page, buf->count);
out:
return ret;
}
static int debug_close(struct inode *inode, struct file *file)
{
struct debug_buffer *buf = file->private_data;
if (buf) {
if (buf->page)
free_page((unsigned long)buf->page);
kfree(buf);
}
return 0;
}
static int debug_async_open(struct inode *inode, struct file *file)
{
file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
return file->private_data ? 0 : -ENOMEM;
}
static int debug_periodic_open(struct inode *inode, struct file *file)
{
file->private_data = alloc_buffer(inode->i_private,
fill_periodic_buffer);
return file->private_data ? 0 : -ENOMEM;
}
static int debug_registers_open(struct inode *inode, struct file *file)
{
file->private_data = alloc_buffer(inode->i_private,
fill_registers_buffer);
return file->private_data ? 0 : -ENOMEM;
}
static inline void create_debug_files (struct ohci_hcd *ohci)
{
struct usb_bus *bus = &ohci_to_hcd(ohci)->self;
ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root);
if (!ohci->debug_dir)
goto dir_error;
ohci->debug_async = debugfs_create_file("async", S_IRUGO,
ohci->debug_dir, ohci,
&debug_async_fops);
if (!ohci->debug_async)
goto async_error;
ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
ohci->debug_dir, ohci,
&debug_periodic_fops);
if (!ohci->debug_periodic)
goto periodic_error;
ohci->debug_registers = debugfs_create_file("registers", S_IRUGO,
ohci->debug_dir, ohci,
&debug_registers_fops);
if (!ohci->debug_registers)
goto registers_error;
ohci_dbg (ohci, "created debug files\n");
return;
registers_error:
debugfs_remove(ohci->debug_periodic);
periodic_error:
debugfs_remove(ohci->debug_async);
async_error:
debugfs_remove(ohci->debug_dir);
dir_error:
ohci->debug_periodic = NULL;
ohci->debug_async = NULL;
ohci->debug_dir = NULL;
}
static inline void remove_debug_files (struct ohci_hcd *ohci)
{
debugfs_remove(ohci->debug_registers);
debugfs_remove(ohci->debug_periodic);
debugfs_remove(ohci->debug_async);
debugfs_remove(ohci->debug_dir);
}
/*-------------------------------------------------------------------------*/