Skip to content

Commit

Permalink
gigaset: clean up urb->status usage
Browse files Browse the repository at this point in the history 
Make there only be one reference to urb->status per URB callback, and none
outside, in preparation for removal of that field.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Cc: Greg KH <gregkh@suse.de>
Cc: Hansjoerg Lipp <hjlipp@web.de>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  • Loading branch information
Tilman Schmidt authored and Linus Torvalds committed Feb 6, 2008
1 parent f47cd9b commit dbd9823
Show file tree
Hide file tree
Showing 3 changed files with 58 additions and 41 deletions.
84 changes: 48 additions & 36 deletions drivers/isdn/gigaset/bas-gigaset.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -248,12 +248,12 @@ static inline void dump_urb(enum debuglevel level, const char *tag,
if (urb) {
gig_dbg(level,
" dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
"status=%d, hcpriv=0x%08lx, transfer_flags=0x%x,",
"hcpriv=0x%08lx, transfer_flags=0x%x,",
(unsigned long) urb->dev,
usb_pipetype_str(urb->pipe),
usb_pipeendpoint(urb->pipe), usb_pipedevice(urb->pipe),
usb_pipein(urb->pipe) ? "in" : "out",
urb->status, (unsigned long) urb->hcpriv,
(unsigned long) urb->hcpriv,
urb->transfer_flags);
gig_dbg(level,
" transfer_buffer=0x%08lx[%d], actual_length=%d, "
Expand Down Expand Up @@ -459,6 +459,7 @@ static void read_ctrl_callback(struct urb *urb)
struct inbuf_t *inbuf = urb->context;
struct cardstate *cs = inbuf->cs;
struct bas_cardstate *ucs = cs->hw.bas;
int status = urb->status;
int have_data = 0;
unsigned numbytes;
int rc;
Expand All @@ -472,7 +473,7 @@ static void read_ctrl_callback(struct urb *urb)

del_timer(&ucs->timer_cmd_in);

switch (urb->status) {
switch (status) {
case 0: /* normal completion */
numbytes = urb->actual_length;
if (unlikely(numbytes != ucs->rcvbuf_size)) {
Expand Down Expand Up @@ -506,12 +507,12 @@ static void read_ctrl_callback(struct urb *urb)
case -ESHUTDOWN: /* device shut down */
/* no action necessary */
gig_dbg(DEBUG_USBREQ, "%s: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
break;

default: /* severe trouble */
dev_warn(cs->dev, "control read: %s\n",
get_usb_statmsg(urb->status));
get_usb_statmsg(status));
if (ucs->retry_cmd_in++ < BAS_RETRY) {
dev_notice(cs->dev, "control read: retry %d\n",
ucs->retry_cmd_in);
Expand Down Expand Up @@ -601,20 +602,21 @@ static void read_int_callback(struct urb *urb)
struct cardstate *cs = urb->context;
struct bas_cardstate *ucs = cs->hw.bas;
struct bc_state *bcs;
int status = urb->status;
unsigned long flags;
int rc;
unsigned l;
int channel;

switch (urb->status) {
switch (status) {
case 0: /* success */
break;
case -ENOENT: /* cancelled */
case -ECONNRESET: /* cancelled (async) */
case -EINPROGRESS: /* pending */
/* ignore silently */
gig_dbg(DEBUG_USBREQ, "%s: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
return;
case -ENODEV: /* device removed */
case -ESHUTDOWN: /* device shut down */
Expand All @@ -623,7 +625,7 @@ static void read_int_callback(struct urb *urb)
return;
default: /* severe trouble */
dev_warn(cs->dev, "interrupt read: %s\n",
get_usb_statmsg(urb->status));
get_usb_statmsg(status));
//FIXME corrective action? resubmission always ok?
goto resubmit;
}
Expand Down Expand Up @@ -766,17 +768,18 @@ static void read_iso_callback(struct urb *urb)
{
struct bc_state *bcs;
struct bas_bc_state *ubc;
int status = urb->status;
unsigned long flags;
int i, rc;

/* status codes not worth bothering the tasklet with */
if (unlikely(urb->status == -ENOENT ||
urb->status == -ECONNRESET ||
urb->status == -EINPROGRESS ||
urb->status == -ENODEV ||
urb->status == -ESHUTDOWN)) {
if (unlikely(status == -ENOENT ||
status == -ECONNRESET ||
status == -EINPROGRESS ||
status == -ENODEV ||
status == -ESHUTDOWN)) {
gig_dbg(DEBUG_ISO, "%s: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
return;
}

Expand All @@ -787,10 +790,11 @@ static void read_iso_callback(struct urb *urb)
if (likely(ubc->isoindone == NULL)) {
/* pass URB to tasklet */
ubc->isoindone = urb;
ubc->isoinstatus = status;
tasklet_schedule(&ubc->rcvd_tasklet);
} else {
/* tasklet still busy, drop data and resubmit URB */
ubc->loststatus = urb->status;
ubc->loststatus = status;
for (i = 0; i < BAS_NUMFRAMES; i++) {
ubc->isoinlost += urb->iso_frame_desc[i].actual_length;
if (unlikely(urb->iso_frame_desc[i].status != 0 &&
Expand Down Expand Up @@ -831,22 +835,24 @@ static void write_iso_callback(struct urb *urb)
{
struct isow_urbctx_t *ucx;
struct bas_bc_state *ubc;
int status = urb->status;
unsigned long flags;

/* status codes not worth bothering the tasklet with */
if (unlikely(urb->status == -ENOENT ||
urb->status == -ECONNRESET ||
urb->status == -EINPROGRESS ||
urb->status == -ENODEV ||
urb->status == -ESHUTDOWN)) {
if (unlikely(status == -ENOENT ||
status == -ECONNRESET ||
status == -EINPROGRESS ||
status == -ENODEV ||
status == -ESHUTDOWN)) {
gig_dbg(DEBUG_ISO, "%s: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
return;
}

/* pass URB context to tasklet */
ucx = urb->context;
ubc = ucx->bcs->hw.bas;
ucx->status = status;

spin_lock_irqsave(&ubc->isooutlock, flags);
ubc->isooutovfl = ubc->isooutdone;
Expand Down Expand Up @@ -1070,6 +1076,7 @@ static void write_iso_tasklet(unsigned long data)
struct cardstate *cs = bcs->cs;
struct isow_urbctx_t *done, *next, *ovfl;
struct urb *urb;
int status;
struct usb_iso_packet_descriptor *ifd;
int offset;
unsigned long flags;
Expand Down Expand Up @@ -1126,7 +1133,8 @@ static void write_iso_tasklet(unsigned long data)

/* process completed URB */
urb = done->urb;
switch (urb->status) {
status = done->status;
switch (status) {
case -EXDEV: /* partial completion */
gig_dbg(DEBUG_ISO, "%s: URB partially completed",
__func__);
Expand Down Expand Up @@ -1179,7 +1187,7 @@ static void write_iso_tasklet(unsigned long data)
break;
default: /* severe trouble */
dev_warn(cs->dev, "isochronous write: %s\n",
get_usb_statmsg(urb->status));
get_usb_statmsg(status));
}

/* mark the write buffer area covered by this URB as free */
Expand Down Expand Up @@ -1233,6 +1241,7 @@ static void read_iso_tasklet(unsigned long data)
struct bas_bc_state *ubc = bcs->hw.bas;
struct cardstate *cs = bcs->cs;
struct urb *urb;
int status;
char *rcvbuf;
unsigned long flags;
int totleft, numbytes, offset, frame, rc;
Expand All @@ -1245,6 +1254,7 @@ static void read_iso_tasklet(unsigned long data)
spin_unlock_irqrestore(&ubc->isoinlock, flags);
return;
}
status = ubc->isoinstatus;
ubc->isoindone = NULL;
if (unlikely(ubc->loststatus != -EINPROGRESS)) {
dev_warn(cs->dev,
Expand All @@ -1260,11 +1270,11 @@ static void read_iso_tasklet(unsigned long data)
gig_dbg(DEBUG_ISO,
"%s: channel not running, "
"dropped URB with status: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
return;
}

switch (urb->status) {
switch (status) {
case 0: /* normal completion */
break;
case -EXDEV: /* inspect individual frames
Expand All @@ -1276,15 +1286,15 @@ static void read_iso_tasklet(unsigned long data)
case -ECONNRESET:
case -EINPROGRESS:
gig_dbg(DEBUG_ISO, "%s: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
continue; /* -> skip */
case -EPIPE:
dev_err(cs->dev, "isochronous read stalled\n");
error_hangup(bcs);
continue; /* -> skip */
default: /* severe trouble */
dev_warn(cs->dev, "isochronous read: %s\n",
get_usb_statmsg(urb->status));
get_usb_statmsg(status));
goto error;
}

Expand Down Expand Up @@ -1418,11 +1428,12 @@ static void req_timeout(unsigned long data)
static void write_ctrl_callback(struct urb *urb)
{
struct bas_cardstate *ucs = urb->context;
int status = urb->status;
int rc;
unsigned long flags;

/* check status */
switch (urb->status) {
switch (status) {
case 0: /* normal completion */
spin_lock_irqsave(&ucs->lock, flags);
switch (ucs->pending) {
Expand All @@ -1441,20 +1452,20 @@ static void write_ctrl_callback(struct urb *urb)
case -ESHUTDOWN: /* device shut down */
/* ignore silently */
gig_dbg(DEBUG_USBREQ, "%s: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
break;

default: /* any failure */
if (++ucs->retry_ctrl > BAS_RETRY) {
dev_err(&ucs->interface->dev,
"control request 0x%02x failed: %s\n",
ucs->dr_ctrl.bRequest,
get_usb_statmsg(urb->status));
get_usb_statmsg(status));
break; /* give up */
}
dev_notice(&ucs->interface->dev,
"control request 0x%02x: %s, retry %d\n",
ucs->dr_ctrl.bRequest, get_usb_statmsg(urb->status),
ucs->dr_ctrl.bRequest, get_usb_statmsg(status),
ucs->retry_ctrl);
/* urb->dev is clobbered by USB subsystem */
urb->dev = ucs->udev;
Expand Down Expand Up @@ -1665,12 +1676,13 @@ static void write_command_callback(struct urb *urb)
{
struct cardstate *cs = urb->context;
struct bas_cardstate *ucs = cs->hw.bas;
int status = urb->status;
unsigned long flags;

update_basstate(ucs, 0, BS_ATWRPEND);

/* check status */
switch (urb->status) {
switch (status) {
case 0: /* normal completion */
break;
case -ENOENT: /* cancelled */
Expand All @@ -1680,26 +1692,26 @@ static void write_command_callback(struct urb *urb)
case -ESHUTDOWN: /* device shut down */
/* ignore silently */
gig_dbg(DEBUG_USBREQ, "%s: %s",
__func__, get_usb_statmsg(urb->status));
__func__, get_usb_statmsg(status));
return;
default: /* any failure */
if (++ucs->retry_cmd_out > BAS_RETRY) {
dev_warn(cs->dev,
"command write: %s, "
"giving up after %d retries\n",
get_usb_statmsg(urb->status),
get_usb_statmsg(status),
ucs->retry_cmd_out);
break;
}
if (cs->cmdbuf == NULL) {
dev_warn(cs->dev,
"command write: %s, "
"cannot retry - cmdbuf gone\n",
get_usb_statmsg(urb->status));
get_usb_statmsg(status));
break;
}
dev_notice(cs->dev, "command write: %s, retry %d\n",
get_usb_statmsg(urb->status), ucs->retry_cmd_out);
get_usb_statmsg(status), ucs->retry_cmd_out);
if (atwrite_submit(cs, cs->cmdbuf->buf, cs->cmdbuf->len) >= 0)
/* resubmitted - bypass regular exit block */
return;
Expand Down
3 changes: 3 additions & 0 deletions drivers/isdn/gigaset/gigaset.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -350,11 +350,13 @@ struct isowbuf_t {
* - urb: pointer to the URB itself
* - bcs: pointer to the B Channel control structure
* - limit: end of write buffer area covered by this URB
* - status: URB completion status
*/
struct isow_urbctx_t {
struct urb *urb;
struct bc_state *bcs;
int limit;
int status;
};

/* AT state structure
Expand Down Expand Up @@ -574,6 +576,7 @@ struct bas_bc_state {
struct urb *isoinurbs[BAS_INURBS];
unsigned char isoinbuf[BAS_INBUFSIZE * BAS_INURBS];
struct urb *isoindone; /* completed isoc read URB */
int isoinstatus; /* status of completed URB */
int loststatus; /* status of dropped URB */
unsigned isoinlost; /* number of bytes lost */
/* state of bit unstuffing algorithm
Expand Down
12 changes: 7 additions & 5 deletions drivers/isdn/gigaset/usb-gigaset.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -361,13 +361,14 @@ static void gigaset_read_int_callback(struct urb *urb)
{
struct inbuf_t *inbuf = urb->context;
struct cardstate *cs = inbuf->cs;
int status = urb->status;
int resubmit = 0;
int r;
unsigned numbytes;
unsigned char *src;
unsigned long flags;

if (!urb->status) {
if (!status) {
if (!cs->connected) {
err("%s: disconnected", __func__); /* should never happen */
return;
Expand All @@ -393,8 +394,8 @@ static void gigaset_read_int_callback(struct urb *urb)
} else {
/* The urb might have been killed. */
gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
__func__, urb->status);
if (urb->status != -ENOENT) { /* not killed */
__func__, status);
if (status != -ENOENT) { /* not killed */
if (!cs->connected) {
err("%s: disconnected", __func__); /* should never happen */
return;
Expand All @@ -418,11 +419,12 @@ static void gigaset_read_int_callback(struct urb *urb)
static void gigaset_write_bulk_callback(struct urb *urb)
{
struct cardstate *cs = urb->context;
int status = urb->status;
unsigned long flags;

if (urb->status)
if (status)
dev_err(cs->dev, "bulk transfer failed (status %d)\n",
-urb->status);
-status);
/* That's all we can do. Communication problems
are handled by timeouts or network protocols. */

Expand Down

0 comments on commit dbd9823

Please sign in to comment.