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| author | Johan Hovold <jhovold@gmail.com> | 2010-05-15 17:53:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-20 13:21:48 -0700 |
| commit | 56a1df46c19150db0a9b0f0c14e0b1d42e7f32d4 (patch) | |
| tree | a46afa9a17f75a420599ecb85d194d68e3136dbf /drivers/usb/serial/generic.c | |
| parent | c0f631d1948658b27349545b2cbcb4b32f010c7a (diff) | |
| download | kernel_samsung_smdk4412-56a1df46c19150db0a9b0f0c14e0b1d42e7f32d4.tar.gz kernel_samsung_smdk4412-56a1df46c19150db0a9b0f0c14e0b1d42e7f32d4.tar.bz2 kernel_samsung_smdk4412-56a1df46c19150db0a9b0f0c14e0b1d42e7f32d4.zip | |
USB: serial: add special case for processing of empty read urbs
Return immediately from generic process_read_urb if urb is empty.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial/generic.c')
| -rw-r--r-- | drivers/usb/serial/generic.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c index fcd30b84155..a817ced8283 100644 --- a/drivers/usb/serial/generic.c +++ b/drivers/usb/serial/generic.c @@ -324,6 +324,9 @@ void usb_serial_generic_process_read_urb(struct urb *urb) char *ch = (char *)urb->transfer_buffer; int i; + if (!urb->actual_length) + return; + tty = tty_port_tty_get(&port->port); if (!tty) return; |