diff options
Diffstat (limited to 'drivers/serial/sunzilog.c')
| -rw-r--r-- | drivers/serial/sunzilog.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c index 5c4231a..bff42a7 100644 --- a/drivers/serial/sunzilog.c +++ b/drivers/serial/sunzilog.c @@ -610,27 +610,28 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id, struct pt_regs *reg static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port) { struct zilog_channel __iomem *channel; - unsigned long flags; unsigned char status; - spin_lock_irqsave(&port->lock, flags); - channel = ZILOG_CHANNEL_FROM_PORT(port); status = sbus_readb(&channel->control); ZSDELAY(); - spin_unlock_irqrestore(&port->lock, flags); - return status; } /* The port lock is not held. */ static unsigned int sunzilog_tx_empty(struct uart_port *port) { + unsigned long flags; unsigned char status; unsigned int ret; + spin_lock_irqsave(&port->lock, flags); + status = sunzilog_read_channel_status(port); + + spin_unlock_irqrestore(&port->lock, flags); + if (status & Tx_BUF_EMP) ret = TIOCSER_TEMT; else @@ -639,7 +640,7 @@ static unsigned int sunzilog_tx_empty(struct uart_port *port) return ret; } -/* The port lock is not held. */ +/* The port lock is held and interrupts are disabled. */ static unsigned int sunzilog_get_mctrl(struct uart_port *port) { unsigned char status; @@ -1071,7 +1072,7 @@ static void __init sunzilog_alloc_tables(void) */ static struct zilog_layout __iomem * __init get_zs_sun4u(int chip, int zsnode) { - unsigned long mapped_addr; + void __iomem *mapped_addr; unsigned int sun4u_ino; struct sbus_bus *sbus = NULL; struct sbus_dev *sdev = NULL; @@ -1111,9 +1112,9 @@ static struct zilog_layout __iomem * __init get_zs_sun4u(int chip, int zsnode) apply_fhc_ranges(central_bus->child, &zsregs[0], 1); apply_central_ranges(central_bus, &zsregs[0], 1); - mapped_addr = - (((u64)zsregs[0].which_io)<<32UL) | - ((u64)zsregs[0].phys_addr); + mapped_addr = (void __iomem *) + ((((u64)zsregs[0].which_io)<<32UL) | + ((u64)zsregs[0].phys_addr)); } if (zilog_irq == -1) { |