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Date: Wed, 16 Sep 2009 22:08:05 -0500 From: Jason Wessel <jason.wessel@...driver.com> To: gregkh@...e.de Cc: linux-usb@...r.kernel.org, stern@...land.harvard.edu, linux-kernel@...r.kernel.org, Jason Wessel <jason.wessel@...driver.com> Subject: [PATCH 1/3] usb console: fix mutex lock regression During the 2.6.32 development the use of serial->disc_mutex was introduced. In usb_console_setup() the call to usb_serial_get_by_index() will obtain this mutex. The usb_console_setup() must release the mutex before it completes else later calls to the usb serial core will hang. Signed-off-by: Jason Wessel <jason.wessel@...driver.com> Cc: Greg KH <gregkh@...e.de> Cc: Alan Stern <stern@...land.harvard.edu> --- drivers/usb/serial/console.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c index be086e4..166ba4e 100644 --- a/drivers/usb/serial/console.c +++ b/drivers/usb/serial/console.c @@ -176,6 +176,7 @@ static int usb_console_setup(struct console *co, char *options) * indicate this port is now acting as a system console. */ port->console = 1; retval = 0; + mutex_unlock(&serial->disc_mutex); out: return retval; -- 1.6.4.rc1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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