diff options
| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 10:45:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 10:45:23 -0700 |
| commit | 02b2318e07f98a7cdf7089a4457a8d62424aa824 (patch) | |
| tree | b40353a9ee6b034e21192ceb5df445fbc5fbdd32 /drivers/serial/sunsab.c | |
| parent | b91cba52e9b7b3f1c0037908a192d93a869ca9e5 (diff) | |
| parent | d54bc2793ec3405c6b8f217568a82b87bd8a591b (diff) | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: (26 commits)
[SPARC64]: Fix UP build.
[SPARC64]: dr-cpu unconfigure support.
[SERIAL]: Fix console write locking in sparc drivers.
[SPARC64]: Give more accurate errors in dr_cpu_configure().
[SPARC64]: Clear cpu_{core,sibling}_map[] in smp_fill_in_sib_core_maps()
[SPARC64]: Fix leak when DR added cpu does not bootup.
[SPARC64]: Add ->set_affinity IRQ handlers.
[SPARC64]: Process dr-cpu events in a kthread instead of workqueue.
[SPARC64]: More sensible udelay implementation.
[SPARC64]: SMP build fixes.
[SPARC64]: mdesc.c needs linux/mm.h
[SPARC64]: Fix build regressions added by dr-cpu changes.
[SPARC64]: Unconditionally register vio_bus_type.
[SPARC64]: Initial LDOM cpu hotplug support.
[SPARC64]: Fix setting of variables in LDOM guest.
[SPARC64]: Fix MD property lifetime bugs.
[SPARC64]: Abstract out mdesc accesses for better MD update handling.
[SPARC64]: Use more mearningful names for IRQ registry.
[SPARC64]: Initial domain-services driver.
[SPARC64]: Export powerd facilities for external entities.
...
Diffstat (limited to 'drivers/serial/sunsab.c')
| -rw-r--r-- | drivers/serial/sunsab.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c index deb9ab4b5a0..8a0f9e4408d 100644 --- a/drivers/serial/sunsab.c +++ b/drivers/serial/sunsab.c @@ -860,22 +860,31 @@ static int num_channels; static void sunsab_console_putchar(struct uart_port *port, int c) { struct uart_sunsab_port *up = (struct uart_sunsab_port *)port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); sunsab_tec_wait(up); writeb(c, &up->regs->w.tic); - - spin_unlock_irqrestore(&up->port.lock, flags); } static void sunsab_console_write(struct console *con, const char *s, unsigned n) { struct uart_sunsab_port *up = &sunsab_ports[con->index]; + unsigned long flags; + int locked = 1; + + local_irq_save(flags); + if (up->port.sysrq) { + locked = 0; + } else if (oops_in_progress) { + locked = spin_trylock(&up->port.lock); + } else + spin_lock(&up->port.lock); uart_console_write(&up->port, s, n, sunsab_console_putchar); sunsab_tec_wait(up); + + if (locked) + spin_unlock(&up->port.lock); + local_irq_restore(flags); } static int sunsab_console_setup(struct console *con, char *options) |