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n_gsm: fix the wrong FCS handling 

FCS could be GSM0_SOF, so will break state machine...

[This byte isn't quoted in any way so a SOF here doesn't imply an error
 occurred.]

Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: stable <stable@kernel.org> [3.0]

[Trivial but best backported once its in 3.1rc I think]
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Du, Alek 2011-07-07 15:16:48 +01:00 committed by Greg Kroah-Hartman
parent bff52fd458
commit f086ced171
1 changed files with 0 additions and 4 deletions
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4
drivers/tty/n_gsm.c
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@ -1871,10 +1871,6 @@ static void gsm0_receive(struct gsm_mux *gsm, unsigned char c)
break;
case GSM_FCS: /* FCS follows the packet */
gsm->received_fcs = c;
if (c == GSM0_SOF) {
gsm->state = GSM_SEARCH;
break;
}
gsm_queue(gsm);
gsm->state = GSM_SSOF;
break;