X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fpcmcia%2Fcs.c;h=75ed866e6953944c871dd46bfc94f4a54da997bd;hb=a8408c17d0038b76a83affb1b56dc18fa1e7ed86;hp=823ecda32216f3423a42a4c33795df47849fa994;hpb=f971dbd5da4e2fbf756d07b938a9c65a9c75178b;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c index 823ecda..75ed866 100644 --- a/drivers/pcmcia/cs.c +++ b/drivers/pcmcia/cs.c @@ -76,65 +76,6 @@ DECLARE_RWSEM(pcmcia_socket_list_rwsem); EXPORT_SYMBOL(pcmcia_socket_list_rwsem); -/* - * Low-level PCMCIA socket drivers need to register with the PCCard - * core using pcmcia_register_socket. - * - * socket drivers are expected to use the following callbacks in their - * .drv struct: - * - pcmcia_socket_dev_suspend - * - pcmcia_socket_dev_resume - * These functions check for the appropriate struct pcmcia_soket arrays, - * and pass them to the low-level functions pcmcia_{suspend,resume}_socket - */ -static int socket_early_resume(struct pcmcia_socket *skt); -static int socket_late_resume(struct pcmcia_socket *skt); -static int socket_resume(struct pcmcia_socket *skt); -static int socket_suspend(struct pcmcia_socket *skt); - -static void pcmcia_socket_dev_run(struct device *dev, - int (*cb)(struct pcmcia_socket *)) -{ - struct pcmcia_socket *socket; - - down_read(&pcmcia_socket_list_rwsem); - list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { - if (socket->dev.parent != dev) - continue; - mutex_lock(&socket->skt_mutex); - cb(socket); - mutex_unlock(&socket->skt_mutex); - } - up_read(&pcmcia_socket_list_rwsem); -} - -int pcmcia_socket_dev_suspend(struct device *dev) -{ - pcmcia_socket_dev_run(dev, socket_suspend); - return 0; -} -EXPORT_SYMBOL(pcmcia_socket_dev_suspend); - -void pcmcia_socket_dev_early_resume(struct device *dev) -{ - pcmcia_socket_dev_run(dev, socket_early_resume); -} -EXPORT_SYMBOL(pcmcia_socket_dev_early_resume); - -void pcmcia_socket_dev_late_resume(struct device *dev) -{ - pcmcia_socket_dev_run(dev, socket_late_resume); -} -EXPORT_SYMBOL(pcmcia_socket_dev_late_resume); - -int pcmcia_socket_dev_resume(struct device *dev) -{ - pcmcia_socket_dev_run(dev, socket_resume); - return 0; -} -EXPORT_SYMBOL(pcmcia_socket_dev_resume); - - struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) { struct device *dev = get_device(&skt->dev); @@ -400,10 +341,19 @@ static void socket_shutdown(struct pcmcia_socket *s) s->lock_count = 0; kfree(s->fake_cis); s->fake_cis = NULL; + s->functions = 0; + + /* From here on we can be sure that only we (that is, the + * pccardd thread) accesses this socket, and all (16-bit) + * PCMCIA interactions are gone. Therefore, release + * ops_mutex so that we don't get a sysfs-related lockdep + * warning. + */ + mutex_unlock(&s->ops_mutex); + #ifdef CONFIG_CARDBUS cb_free(s); #endif - s->functions = 0; /* give socket some time to power down */ msleep(100); @@ -415,7 +365,6 @@ static void socket_shutdown(struct pcmcia_socket *s) } s->state &= ~SOCKET_INUSE; - mutex_unlock(&s->ops_mutex); } static int socket_setup(struct pcmcia_socket *skt, int initial_delay) @@ -570,12 +519,18 @@ static int socket_early_resume(struct pcmcia_socket *skt) static int socket_late_resume(struct pcmcia_socket *skt) { + int ret; + mutex_lock(&skt->ops_mutex); skt->state &= ~SOCKET_SUSPEND; mutex_unlock(&skt->ops_mutex); - if (!(skt->state & SOCKET_PRESENT)) - return socket_insert(skt); + if (!(skt->state & SOCKET_PRESENT)) { + ret = socket_insert(skt); + if (ret == -ENODEV) + ret = 0; + return ret; + } if (skt->resume_status) { socket_shutdown(skt); @@ -681,6 +636,9 @@ static int pccardd(void *__skt) complete(&skt->thread_done); + /* wait for userspace to catch up */ + msleep(250); + set_freezable(); for (;;) { unsigned long flags; @@ -728,6 +686,11 @@ static int pccardd(void *__skt) if (!ret) socket_suspend(skt); } + if ((sysfs_events & PCMCIA_UEVENT_REQUERY) && + !(skt->state & SOCKET_CARDBUS)) { + if (!ret && skt->callback) + skt->callback->requery(skt); + } } mutex_unlock(&skt->skt_mutex); @@ -783,7 +746,8 @@ EXPORT_SYMBOL(pcmcia_parse_events); * userspace-issued insert, eject, suspend and resume commands must be * handled by pccardd to avoid any sysfs-related deadlocks. Valid events * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert), - * PCMCIA_UEVENT_RESUME (for resume) and PCMCIA_UEVENT_SUSPEND (for suspend). + * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend) + * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card). */ void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events) { @@ -902,11 +866,66 @@ static void pcmcia_release_socket_class(struct class *data) } +#ifdef CONFIG_PM + +static int __pcmcia_pm_op(struct device *dev, + int (*callback) (struct pcmcia_socket *skt)) +{ + struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); + int ret; + + mutex_lock(&s->skt_mutex); + ret = callback(s); + mutex_unlock(&s->skt_mutex); + + return ret; +} + +static int pcmcia_socket_dev_suspend_noirq(struct device *dev) +{ + return __pcmcia_pm_op(dev, socket_suspend); +} + +static int pcmcia_socket_dev_resume_noirq(struct device *dev) +{ + return __pcmcia_pm_op(dev, socket_early_resume); +} + +static int pcmcia_socket_dev_resume(struct device *dev) +{ + return __pcmcia_pm_op(dev, socket_late_resume); +} + +static const struct dev_pm_ops pcmcia_socket_pm_ops = { + /* dev_resume may be called with IRQs enabled */ + SET_SYSTEM_SLEEP_PM_OPS(NULL, + pcmcia_socket_dev_resume) + + /* late suspend must be called with IRQs disabled */ + .suspend_noirq = pcmcia_socket_dev_suspend_noirq, + .freeze_noirq = pcmcia_socket_dev_suspend_noirq, + .poweroff_noirq = pcmcia_socket_dev_suspend_noirq, + + /* early resume must be called with IRQs disabled */ + .resume_noirq = pcmcia_socket_dev_resume_noirq, + .thaw_noirq = pcmcia_socket_dev_resume_noirq, + .restore_noirq = pcmcia_socket_dev_resume_noirq, +}; + +#define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops) + +#else /* CONFIG_PM */ + +#define PCMCIA_SOCKET_CLASS_PM_OPS NULL + +#endif /* CONFIG_PM */ + struct class pcmcia_socket_class = { .name = "pcmcia_socket", .dev_uevent = pcmcia_socket_uevent, .dev_release = pcmcia_release_socket, .class_release = pcmcia_release_socket_class, + .pm = PCMCIA_SOCKET_CLASS_PM_OPS, }; EXPORT_SYMBOL(pcmcia_socket_class);