--- drivers/staging/comedi/drivers/usbdux.c
+++ drivers/staging/comedi/drivers/usbdux.c
@@ -1,4 +1,4 @@
-#define DRIVER_VERSION "v2.2"
+#define DRIVER_VERSION "v2.4"
#define DRIVER_AUTHOR "Bernd Porr, BerndPorr@f2s.com"
#define DRIVER_DESC "Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com"
/*
@@ -80,6 +80,9 @@ sampling rate. If you sample two channel
* 2.0: PWM seems to be stable and is not interfering with the other functions
* 2.1: changed PWM API
* 2.2: added firmware kernel request to fix an udev problem
+ * 2.3: corrected a bug in bulk timeouts which were far too short
+ * 2.4: fixed a bug which causes the driver to hang when it ran out of data.
+ * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it.
*
*/
@@ -101,8 +104,8 @@ sampling rate. If you sample two channel
#define BOARDNAME "usbdux"
-/* timeout for the USB-transfer */
-#define EZTIMEOUT 30
+/* timeout for the USB-transfer in ms*/
+#define BULK_TIMEOUT 1000
/* constants for "firmware" upload and download */
#define USBDUXSUB_FIRMWARE 0xA0
@@ -531,6 +534,7 @@ static void usbduxsub_ai_IsocIrq(struct
}
}
/* tell comedi that data is there */
+ s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS;
comedi_event(this_usbduxsub->comedidev, s);
}
@@ -750,7 +754,7 @@ static int usbduxsub_start(struct usbdux
/* Length */
1,
/* Timeout */
- EZTIMEOUT);
+ BULK_TIMEOUT);
if (errcode < 0) {
dev_err(&usbduxsub->interface->dev,
"comedi_: control msg failed (start)\n");
@@ -780,7 +784,7 @@ static int usbduxsub_stop(struct usbduxs
/* Length */
1,
/* Timeout */
- EZTIMEOUT);
+ BULK_TIMEOUT);
if (errcode < 0) {
dev_err(&usbduxsub->interface->dev,
"comedi_: control msg failed (stop)\n");
@@ -810,7 +814,7 @@ static int usbduxsub_upload(struct usbdu
/* length */
len,
/* timeout */
- EZTIMEOUT);
+ BULK_TIMEOUT);
dev_dbg(&usbduxsub->interface->dev, "comedi_: result=%d\n", errcode);
if (errcode < 0) {
dev_err(&usbduxsub->interface->dev, "comedi_: upload failed\n");
@@ -1110,7 +1114,7 @@ static int send_dux_commands(struct usbd
usb_sndbulkpipe(this_usbduxsub->usbdev,
COMMAND_OUT_EP),
this_usbduxsub->dux_commands, SIZEOFDUXBUFFER,
- &nsent, 10);
+ &nsent, BULK_TIMEOUT);
if (result < 0)
dev_err(&this_usbduxsub->interface->dev, "comedi%d: "
"could not transmit dux_command to the usb-device, "
@@ -1130,7 +1134,7 @@ static int receive_dux_commands(struct u
usb_rcvbulkpipe(this_usbduxsub->usbdev,
COMMAND_IN_EP),
this_usbduxsub->insnBuffer, SIZEINSNBUF,
- &nrec, 1);
+ &nrec, BULK_TIMEOUT);
if (result < 0) {
dev_err(&this_usbduxsub->interface->dev, "comedi%d: "
"insn: USB error %d while receiving DUX command"
projects / ziggy471-frankenstein-kernel.git / blobdiff