Re: pl2303 usb serial - bad tty numbers starting at 2.6.20-git3

Am Freitag, 2. März 2007 22:12 schrieb Adam J. Richter:
> 	When I plug in a pl2303-based usb serial device, the device is
> supposed to appear as /dev/tts/USB0 (character device 188, 0).
> However, under kernels that I have tried from 2.6.20-git3 through
> 2.6.21-rc2-git1, /dev/tts/USB<some-random-number> is created, and
> attempting to open that file returns a "no such device" error.  I have
> not seen that random number exceed 256, by the way.  Doing "mknod
> /dev/tts/USB0 c 188 0" and then opening that file resulted kernel oops
> on the one kernel version on which I tried it (I think around
> 2.6.20-git11).

Please try this patch. It is needed in any case and it may be your problem's
cause.

	Regards
		Oliver

--- linux-2.6.21-rc1/drivers/usb/serial/usb-serial.c.alt	2007-02-21 05:32:30.000000000 +0100
+++ linux-2.6.21-rc1/drivers/usb/serial/usb-serial.c	2007-02-26 15:32:50.000000000 +0100
@@ -826,7 +826,6 @@
 			num_ports = type->num_ports;
 	}
 
-	serial->minor = minor;
 	serial->num_ports = num_ports;
 	serial->num_bulk_in = num_bulk_in;
 	serial->num_bulk_out = num_bulk_out;
@@ -980,6 +979,7 @@
 		dev_err(&interface->dev, "No more free serial devices\n");
 		goto probe_error;
 	}
+	serial->minor = minor;
 
 	/* register all of the individual ports with the driver core */
 	for (i = 0; i < num_ports; ++i) {

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