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Date: Fri, 1 Oct 2010 01:35:52 +0200 (CEST)
From: Tilman Schmidt <tilman@...p.cc>
To: Karsten Keil <isdn@...ux-pingi.de>,
David Miller <davem@...emloft.net>
CC: Hansjoerg Lipp <hjlipp@....de>, Karsten Keil <keil@...systems.de>,
i4ldeveloper@...tserv.isdn4linux.de, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 9/9] isdn/gigaset: improve bas_gigaset USB error reporting
Rephrase some USB error messages to make them clearer and more consistent.
Downgrade some warning messages that may occur during normal operation to
debug messages.
Signed-off-by: Tilman Schmidt <tilman@...p.cc>
---
drivers/isdn/gigaset/bas-gigaset.c | 112 +++++++++++++++++++----------------
1 files changed, 61 insertions(+), 51 deletions(-)
diff --git a/drivers/isdn/gigaset/bas-gigaset.c b/drivers/isdn/gigaset/bas-gigaset.c
index 71e3fde..178942a 100644
--- a/drivers/isdn/gigaset/bas-gigaset.c
+++ b/drivers/isdn/gigaset/bas-gigaset.c
@@ -172,7 +172,7 @@ static char *get_usb_rcmsg(int rc)
case -EAGAIN:
return "start frame too early or too much scheduled";
case -EFBIG:
- return "too many isochronous frames requested";
+ return "too many isoc frames requested";
case -EPIPE:
return "endpoint stalled";
case -EMSGSIZE:
@@ -203,13 +203,13 @@ static char *get_usb_statmsg(int status)
case -ENOENT:
return "unlinked (sync)";
case -EINPROGRESS:
- return "pending";
+ return "URB still pending";
case -EPROTO:
- return "bit stuffing error, timeout, or unknown USB error";
+ return "bitstuff error, timeout, or unknown USB error";
case -EILSEQ:
return "CRC mismatch, timeout, or unknown USB error";
case -ETIME:
- return "timed out";
+ return "USB response timeout";
case -EPIPE:
return "endpoint stalled";
case -ECOMM:
@@ -217,15 +217,15 @@ static char *get_usb_statmsg(int status)
case -ENOSR:
return "OUT buffer underrun";
case -EOVERFLOW:
- return "too much data";
+ return "endpoint babble";
case -EREMOTEIO:
- return "short packet detected";
+ return "short packet";
case -ENODEV:
return "device removed";
case -EXDEV:
- return "partial isochronous transfer";
+ return "partial isoc transfer";
case -EINVAL:
- return "invalid argument";
+ return "ISO madness";
case -ECONNRESET:
return "unlinked (async)";
case -ESHUTDOWN:
@@ -872,6 +872,7 @@ static void read_iso_callback(struct urb *urb)
tasklet_hi_schedule(&ubc->rcvd_tasklet);
} else {
/* tasklet still busy, drop data and resubmit URB */
+ gig_dbg(DEBUG_ISO, "%s: overrun", __func__);
ubc->loststatus = status;
for (i = 0; i < BAS_NUMFRAMES; i++) {
ubc->isoinlost += urb->iso_frame_desc[i].actual_length;
@@ -887,13 +888,11 @@ static void read_iso_callback(struct urb *urb)
urb->dev = bcs->cs->hw.bas->udev;
urb->transfer_flags = URB_ISO_ASAP;
urb->number_of_packets = BAS_NUMFRAMES;
- gig_dbg(DEBUG_ISO, "%s: isoc read overrun/resubmit",
- __func__);
rc = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(rc != 0 && rc != -ENODEV)) {
dev_err(bcs->cs->dev,
- "could not resubmit isochronous read "
- "URB: %s\n", get_usb_rcmsg(rc));
+ "could not resubmit isoc read URB: %s\n",
+ get_usb_rcmsg(rc));
dump_urb(DEBUG_ISO, "isoc read", urb);
error_hangup(bcs);
}
@@ -1135,7 +1134,7 @@ static int submit_iso_write_urb(struct isow_urbctx_t *ucx)
gig_dbg(DEBUG_ISO, "%s: disconnected", __func__);
else
dev_err(ucx->bcs->cs->dev,
- "could not submit isochronous write URB: %s\n",
+ "could not submit isoc write URB: %s\n",
get_usb_rcmsg(rc));
return rc;
}
@@ -1180,7 +1179,7 @@ static void write_iso_tasklet(unsigned long data)
ubc->isooutovfl = NULL;
spin_unlock_irqrestore(&ubc->isooutlock, flags);
if (ovfl) {
- dev_err(cs->dev, "isochronous write buffer underrun\n");
+ dev_err(cs->dev, "isoc write underrun\n");
error_hangup(bcs);
break;
}
@@ -1205,7 +1204,7 @@ static void write_iso_tasklet(unsigned long data)
if (next) {
/* couldn't put it back */
dev_err(cs->dev,
- "losing isochronous write URB\n");
+ "losing isoc write URB\n");
error_hangup(bcs);
}
}
@@ -1232,10 +1231,10 @@ static void write_iso_tasklet(unsigned long data)
if (ifd->status ||
ifd->actual_length != ifd->length) {
dev_warn(cs->dev,
- "isochronous write: frame %d: %s, "
- "only %d of %d bytes sent\n",
- i, get_usb_statmsg(ifd->status),
- ifd->actual_length, ifd->length);
+ "isoc write: frame %d[%d/%d]: %s\n",
+ i, ifd->actual_length,
+ ifd->length,
+ get_usb_statmsg(ifd->status));
offset = (ifd->offset +
ifd->actual_length)
% BAS_OUTBUFSIZE;
@@ -1244,11 +1243,11 @@ static void write_iso_tasklet(unsigned long data)
}
break;
case -EPIPE: /* stall - probably underrun */
- dev_err(cs->dev, "isochronous write stalled\n");
+ dev_err(cs->dev, "isoc write: stalled\n");
error_hangup(bcs);
break;
- default: /* severe trouble */
- dev_warn(cs->dev, "isochronous write: %s\n",
+ default: /* other errors */
+ dev_warn(cs->dev, "isoc write: %s\n",
get_usb_statmsg(status));
}
@@ -1304,6 +1303,7 @@ static void read_iso_tasklet(unsigned long data)
struct cardstate *cs = bcs->cs;
struct urb *urb;
int status;
+ struct usb_iso_packet_descriptor *ifd;
char *rcvbuf;
unsigned long flags;
int totleft, numbytes, offset, frame, rc;
@@ -1321,8 +1321,7 @@ static void read_iso_tasklet(unsigned long data)
ubc->isoindone = NULL;
if (unlikely(ubc->loststatus != -EINPROGRESS)) {
dev_warn(cs->dev,
- "isochronous read overrun, "
- "dropped URB with status: %s, %d bytes lost\n",
+ "isoc read overrun, URB dropped (status: %s, %d bytes)\n",
get_usb_statmsg(ubc->loststatus),
ubc->isoinlost);
ubc->loststatus = -EINPROGRESS;
@@ -1352,11 +1351,11 @@ static void read_iso_tasklet(unsigned long data)
__func__, get_usb_statmsg(status));
continue; /* -> skip */
case -EPIPE:
- dev_err(cs->dev, "isochronous read stalled\n");
+ dev_err(cs->dev, "isoc read: stalled\n");
error_hangup(bcs);
continue; /* -> skip */
- default: /* severe trouble */
- dev_warn(cs->dev, "isochronous read: %s\n",
+ default: /* other error */
+ dev_warn(cs->dev, "isoc read: %s\n",
get_usb_statmsg(status));
goto error;
}
@@ -1364,40 +1363,52 @@ static void read_iso_tasklet(unsigned long data)
rcvbuf = urb->transfer_buffer;
totleft = urb->actual_length;
for (frame = 0; totleft > 0 && frame < BAS_NUMFRAMES; frame++) {
- numbytes = urb->iso_frame_desc[frame].actual_length;
- if (unlikely(urb->iso_frame_desc[frame].status))
+ ifd = &urb->iso_frame_desc[frame];
+ numbytes = ifd->actual_length;
+ switch (ifd->status) {
+ case 0: /* success */
+ break;
+ case -EPROTO: /* protocol error or unplug */
+ case -EILSEQ:
+ case -ETIME:
+ /* probably just disconnected, ignore */
+ gig_dbg(DEBUG_ISO,
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ get_usb_statmsg(ifd->status));
+ break;
+ default: /* other error */
+ /* report, assume transferred bytes are ok */
dev_warn(cs->dev,
- "isochronous read: frame %d[%d]: %s\n",
+ "isoc read: frame %d[%d]: %s\n",
frame, numbytes,
- get_usb_statmsg(
- urb->iso_frame_desc[frame].status));
+ get_usb_statmsg(ifd->status));
+ }
if (unlikely(numbytes > BAS_MAXFRAME))
dev_warn(cs->dev,
- "isochronous read: frame %d: "
- "numbytes (%d) > BAS_MAXFRAME\n",
- frame, numbytes);
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ "exceeds max frame size");
if (unlikely(numbytes > totleft)) {
dev_warn(cs->dev,
- "isochronous read: frame %d: "
- "numbytes (%d) > totleft (%d)\n",
- frame, numbytes, totleft);
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ "exceeds total transfer length");
numbytes = totleft;
}
- offset = urb->iso_frame_desc[frame].offset;
+ offset = ifd->offset;
if (unlikely(offset + numbytes > BAS_INBUFSIZE)) {
dev_warn(cs->dev,
- "isochronous read: frame %d: "
- "offset (%d) + numbytes (%d) "
- "> BAS_INBUFSIZE\n",
- frame, offset, numbytes);
+ "isoc read: frame %d[%d]: %s\n",
+ frame, numbytes,
+ "exceeds end of buffer");
numbytes = BAS_INBUFSIZE - offset;
}
gigaset_isoc_receive(rcvbuf + offset, numbytes, bcs);
totleft -= numbytes;
}
if (unlikely(totleft > 0))
- dev_warn(cs->dev,
- "isochronous read: %d data bytes missing\n",
+ dev_warn(cs->dev, "isoc read: %d data bytes missing\n",
totleft);
error:
@@ -1413,9 +1424,9 @@ error:
rc = usb_submit_urb(urb, GFP_ATOMIC);
if (unlikely(rc != 0 && rc != -ENODEV)) {
dev_err(cs->dev,
- "could not resubmit isochronous read URB: %s\n",
+ "could not resubmit isoc read URB: %s\n",
get_usb_rcmsg(rc));
- dump_urb(DEBUG_ISO, "resubmit iso read", urb);
+ dump_urb(DEBUG_ISO, "resubmit isoc read", urb);
error_hangup(bcs);
}
}
@@ -1647,8 +1658,7 @@ static int gigaset_init_bchannel(struct bc_state *bcs)
if (cs->hw.bas->basstate & BS_SUSPEND) {
dev_notice(cs->dev,
- "not starting isochronous I/O, "
- "suspend in progress\n");
+ "not starting isoc I/O, suspend in progress\n");
spin_unlock_irqrestore(&cs->lock, flags);
return -EHOSTUNREACH;
}
@@ -1657,7 +1667,7 @@ static int gigaset_init_bchannel(struct bc_state *bcs)
if (ret < 0) {
spin_unlock_irqrestore(&cs->lock, flags);
dev_err(cs->dev,
- "could not start isochronous I/O for channel B%d: %s\n",
+ "could not start isoc I/O for channel B%d: %s\n",
bcs->channel + 1,
ret == -EFAULT ? "null URB" : get_usb_rcmsg(ret));
if (ret != -ENODEV)
@@ -2086,7 +2096,7 @@ static int gigaset_freebcshw(struct bc_state *bcs)
/* kill URBs and tasklets before freeing - better safe than sorry */
ubc->running = 0;
- gig_dbg(DEBUG_INIT, "%s: killing iso URBs", __func__);
+ gig_dbg(DEBUG_INIT, "%s: killing isoc URBs", __func__);
for (i = 0; i < BAS_OUTURBS; ++i) {
usb_kill_urb(ubc->isoouturbs[i].urb);
usb_free_urb(ubc->isoouturbs[i].urb);
--
1.7.3.15.g442cb
--
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