diff options
Diffstat (limited to 'drivers/staging/dgnc')
| -rw-r--r-- | drivers/staging/dgnc/dgnc_cls.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/staging/dgnc/dgnc_cls.c b/drivers/staging/dgnc/dgnc_cls.c index 3adf40434bee..8697698921aa 100644 --- a/drivers/staging/dgnc/dgnc_cls.c +++ b/drivers/staging/dgnc/dgnc_cls.c @@ -1151,7 +1151,8 @@ static void cls_copy_data_from_queue_to_uart(struct channel_t *ch) static void cls_parse_modem(struct channel_t *ch, uchar signals) { - volatile uchar msignals = signals; + uchar msignals = signals; + ulong lock_flags; if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) return; @@ -1163,6 +1164,7 @@ static void cls_parse_modem(struct channel_t *ch, uchar signals) * Do altpin switching. Altpin switches DCD and DSR. * This prolly breaks DSRPACE, so we should be more clever here. */ + DGNC_LOCK(ch->ch_lock, lock_flags); if (ch->ch_digi.digi_flags & DIGI_ALTPIN) { uchar mswap = signals; if (mswap & UART_MSR_DDCD) { @@ -1182,6 +1184,7 @@ static void cls_parse_modem(struct channel_t *ch, uchar signals) msignals |= UART_MSR_DCD; } } + DGNC_UNLOCK(ch->ch_lock, lock_flags); /* * Scrub off lower bits. They signify delta's, which I don't @@ -1189,6 +1192,7 @@ static void cls_parse_modem(struct channel_t *ch, uchar signals) */ signals &= 0xf0; + DGNC_LOCK(ch->ch_lock, lock_flags); if (msignals & UART_MSR_DCD) ch->ch_mistat |= UART_MSR_DCD; else @@ -1208,6 +1212,7 @@ static void cls_parse_modem(struct channel_t *ch, uchar signals) ch->ch_mistat |= UART_MSR_CTS; else ch->ch_mistat &= ~UART_MSR_CTS; + DGNC_UNLOCK(ch->ch_lock, lock_flags); DPR_MSIGS(( |