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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>
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@ -1871,10 +1871,6 @@ static void gsm0_receive(struct gsm_mux *gsm, unsigned char c)
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break;
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case GSM_FCS: /* FCS follows the packet */
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gsm->received_fcs = c;
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if (c == GSM0_SOF) {
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gsm->state = GSM_SEARCH;
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break;
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}
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gsm_queue(gsm);
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gsm->state = GSM_SSOF;
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break;
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