Attachment 295568 Details for Bug 433889 – pl2303 patch from the upstream changeset

[patch] pl2303 patch from the upstream changeset

pl2303_mode_switch.patch (text/plain), 2.24 KB, created by Kevin W. Rudd on 2008-02-21 22:47:02 UTC

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Creator: Kevin W. Rudd

Created: 2008-02-21 22:47:02 UTC

Size: 2.24 KB

patch

obsolete

>diff -Naur linux-2.6.23.i386/drivers/char/tty_ioctl.c linux-2.6.23.i386-pl/drivers/char/tty_ioctl.c
>--- linux-2.6.23.i386/drivers/char/tty_ioctl.c	2008-02-21 12:20:06.000000000 -0800
>+++ linux-2.6.23.i386-pl/drivers/char/tty_ioctl.c	2008-02-21 12:41:04.000000000 -0800
>@@ -304,6 +304,25 @@
> EXPORT_SYMBOL(tty_get_baud_rate);
> 
> /**
>+ *	tty_termios_hw_change	-	check for setting change
>+ *	@a: termios
>+ *	@b: termios to compare
>+ *
>+ *	Check if any of the bits that affect a dumb device have changed
>+ *	between the two termios structures, or a speed change is needed.
>+ */
>+
>+int tty_termios_hw_change(struct ktermios *a, struct ktermios *b)
>+{
>+if (a->c_ispeed != b->c_ispeed || a->c_ospeed != b->c_ospeed)
>+		return 1;
>+	if ((a->c_cflag ^ b->c_cflag) & ~(HUPCL | CREAD | CLOCAL))
>+		return 1;
>+	return 0;
>+}
>+EXPORT_SYMBOL(tty_termios_hw_change);
>+
>+/**
>  *	change_termios		-	update termios values
>  *	@tty: tty to update
>  *	@new_termios: desired new value
>diff -Naur linux-2.6.23.i386/drivers/usb/serial/pl2303.c linux-2.6.23.i386-pl/drivers/usb/serial/pl2303.c
>--- linux-2.6.23.i386/drivers/usb/serial/pl2303.c	2007-10-09 13:31:38.000000000 -0700
>+++ linux-2.6.23.i386-pl/drivers/usb/serial/pl2303.c	2008-02-21 12:37:55.000000000 -0800
>@@ -483,6 +483,13 @@
> 	}
> 	spin_unlock_irqrestore(&priv->lock, flags);
> 
>+	/* The PL2303 is reported to lose bytes if you change
>+	   serial settings even to the same values as before. Thus
>+	   we actually need to filter in this specific case */
>+
>+	if (!tty_termios_hw_change(port->tty->termios, old_termios))
>+		return;
>+
> 	cflag = port->tty->termios->c_cflag;
> 
> 	buf = kzalloc(7, GFP_KERNEL);
>diff -Naur linux-2.6.23.i386/include/linux/tty.h linux-2.6.23.i386-pl/include/linux/tty.h
>--- linux-2.6.23.i386/include/linux/tty.h	2007-10-09 13:31:38.000000000 -0700
>+++ linux-2.6.23.i386-pl/include/linux/tty.h	2008-02-21 12:36:05.000000000 -0800
>@@ -322,6 +322,7 @@
> extern speed_t tty_get_baud_rate(struct tty_struct *tty);
> extern speed_t tty_termios_baud_rate(struct ktermios *termios);
> extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
>+extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
> 
> extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
> extern void tty_ldisc_deref(struct tty_ldisc *);

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Attachments on bug 433889: 295568