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authorJulian Bradfield <jcb+luu@inf.ed.ac.uk>2006-03-01 10:19:44 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2006-03-20 14:50:00 -0800
commit96050b11f690878c19c1cd39970ab7325d91e18b (patch)
treeb89853fd019eb3c0ded4dfbe612a816cc90346d5 /drivers/usb
parenta5c44e29e5637b5e6fe59d225eb4f438688b3849 (diff)
downloadop-kernel-dev-96050b11f690878c19c1cd39970ab7325d91e18b.zip
op-kernel-dev-96050b11f690878c19c1cd39970ab7325d91e18b.tar.gz
[PATCH] USB: PL2303 and TIOCMIWAIT
A while ago, I posted about TIOCMIWAIT not working with the PL2303 USB-serial adapter. After a brief exchange with Greg, I tracked this to a missing wake-up in the USB interrupt procedures. I got our systems staff to install the enclosed very simple patch to our 2.6.12 kernels, and it all works fine as expected. I guess this should also apply to the latest version and go into the mainstream. Apologies for the long delay in posting the result. The routine being patched is pl2303_update_line_status Signed-off-by: Julian Bradfield <jcb+luu@inf.ed.ac.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/serial/pl2303.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index cf2213b..fb3b6b7 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -826,6 +826,7 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
spin_lock_irqsave(&priv->lock, flags);
priv->line_status = data[status_idx];
spin_unlock_irqrestore(&priv->lock, flags);
+ wake_up_interruptible (&priv->delta_msr_wait);
exit:
return;
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