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| author | Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com> | 2011-09-23 17:22:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-09-27 01:39:23 +0200 |
| commit | f37ac5a144027cddfcf1dfab30eb7c2ba765f5ca (patch) | |
| tree | 9274e84d221362c5acd93dc33cf9208246c0e15b /drivers/tty | |
| parent | 8250: ratelimit LSR safety check engaged warning. (diff) | |
| download | linux-f37ac5a144027cddfcf1dfab30eb7c2ba765f5ca.tar.xz linux-f37ac5a144027cddfcf1dfab30eb7c2ba765f5ca.zip | |
tty/n_gsm: fix a bug in gsm_dlci_data_output (adaption = 2 case)
in adaption=2 case we should put 1 or 2 byte with modem status bits
at the beginning of a buffer pointed by "dp". n_gsm use 1 byte case,
so it allocate a buffer of len + 1 size. As result we should:
* put 1 byte of modem status bits
* increase data pointer
* put "len" bytes of data
but actually we have:
* increase first byte with the value of modem status bits
* decrease "len"
* put orig_len - 1 bytes of data starting from the buffer beggining
This is evidently wrong.
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/n_gsm.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index da3b31a98654..14c26cdd8aca 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -833,8 +833,7 @@ static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci) break; case 2: /* Unstructed with modem bits. Always one byte as we never send inline break data */ - *dp += gsm_encode_modem(dlci); - len--; + *dp++ = gsm_encode_modem(dlci); break; } WARN_ON(kfifo_out_locked(dlci->fifo, dp , len, &dlci->lock) != len); |