Hey, On Sun, Nov 01, 2009 at 09:36:10AM +0100, Rafael J. Wysocki wrote: > Commit 0c570cdeb8fdfcb354a3e9cd81bfc6a09c19de0c > (PM / yenta: Fix cardbus suspend/resume regression) caused resume to > fail on systems with two CardBus bridges. While the exact nature > of the failure is not known at the moment, it can be worked around by > splitting the yenta resume into an early part, executed during the > early phase of resume, that will only resume the socket and power it > up if there was a card in it during suspend, and a late part, > executed during "regular" resume, that will carry out all of the > remaining yenta resume operations. > > Fixes http://bugzilla.kernel.org/show_bug.cgi?id=14334, which is a > listed regression from 2.6.31. The only issue I see is that we now return 0 unconditionally on the resume callbacks. Otherwise, it's Acked-by: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx> > Index: linux-2.6/drivers/pcmcia/yenta_socket.c > =================================================================== > --- linux-2.6.orig/drivers/pcmcia/yenta_socket.c > +++ linux-2.6/drivers/pcmcia/yenta_socket.c > @@ -1275,16 +1275,26 @@ static int yenta_dev_resume_noirq(struct > if (socket->type && socket->type->restore_state) > socket->type->restore_state(socket); > > - return pcmcia_socket_dev_resume(dev); > + pcmcia_socket_dev_early_resume(dev); > + return 0; > +} > + > +static int yenta_dev_resume(struct device *dev) > +{ > + pcmcia_socket_dev_late_resume(dev); > + return 0; > } > > static struct dev_pm_ops yenta_pm_ops = { > .suspend_noirq = yenta_dev_suspend_noirq, > .resume_noirq = yenta_dev_resume_noirq, > + .resume = yenta_dev_resume, > .freeze_noirq = yenta_dev_suspend_noirq, > .thaw_noirq = yenta_dev_resume_noirq, > + .thaw = yenta_dev_resume, > .poweroff_noirq = yenta_dev_suspend_noirq, > .restore_noirq = yenta_dev_resume_noirq, > + .restore = yenta_dev_resume, > }; > > #define YENTA_PM_OPS (¥ta_pm_ops) > Index: linux-2.6/drivers/pcmcia/cs.c > =================================================================== > --- linux-2.6.orig/drivers/pcmcia/cs.c > +++ linux-2.6/drivers/pcmcia/cs.c > @@ -98,10 +98,13 @@ EXPORT_SYMBOL(pcmcia_socket_list_rwsem); > * 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); > > -int pcmcia_socket_dev_suspend(struct device *dev) > +static void pcmcia_socket_dev_run(struct device *dev, > + int (*cb)(struct pcmcia_socket *)) > { > struct pcmcia_socket *socket; > > @@ -110,29 +113,34 @@ int pcmcia_socket_dev_suspend(struct dev > if (socket->dev.parent != dev) > continue; > mutex_lock(&socket->skt_mutex); > - socket_suspend(socket); > + 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); > > -int pcmcia_socket_dev_resume(struct device *dev) > +void pcmcia_socket_dev_early_resume(struct device *dev) > { > - struct pcmcia_socket *socket; > + pcmcia_socket_dev_run(dev, socket_early_resume); > +} > +EXPORT_SYMBOL(pcmcia_socket_dev_early_resume); > > - 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); > - socket_resume(socket); > - mutex_unlock(&socket->skt_mutex); > - } > - up_read(&pcmcia_socket_list_rwsem); > +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); > @@ -546,29 +554,34 @@ static int socket_suspend(struct pcmcia_ > return 0; > } > > -/* > - * Resume a socket. If a card is present, verify its CIS against > - * our cached copy. If they are different, the card has been > - * replaced, and we need to tell the drivers. > - */ > -static int socket_resume(struct pcmcia_socket *skt) > +static void socket_start_resume(struct pcmcia_socket *skt) > { > - int ret; > - > - if (!(skt->state & SOCKET_SUSPEND)) > - return -EBUSY; > - > skt->socket = dead_socket; > skt->ops->init(skt); > skt->ops->set_socket(skt, &skt->socket); > + if (skt->state & SOCKET_PRESENT) > + skt->resume_status = socket_setup(skt, resume_delay); > +} > + > +static int socket_early_resume(struct pcmcia_socket *skt) > +{ > + if (skt->state & SOCKET_SUSPEND) > + socket_start_resume(skt); > + > + return 0; > +} > + > +static int socket_late_resume(struct pcmcia_socket *skt) > +{ > + if (!(skt->state & SOCKET_SUSPEND)) > + return 0; > > if (!(skt->state & SOCKET_PRESENT)) { > skt->state &= ~SOCKET_SUSPEND; > return socket_insert(skt); > } > > - ret = socket_setup(skt, resume_delay); > - if (ret == 0) { > + if (skt->resume_status == 0) { > /* > * FIXME: need a better check here for cardbus cards. > */ > @@ -596,6 +609,20 @@ static int socket_resume(struct pcmcia_s > return 0; > } > > +/* > + * Resume a socket. If a card is present, verify its CIS against > + * our cached copy. If they are different, the card has been > + * replaced, and we need to tell the drivers. > + */ > +static int socket_resume(struct pcmcia_socket *skt) > +{ > + if (!(skt->state & SOCKET_SUSPEND)) > + return -EBUSY; > + > + socket_start_resume(skt); > + return socket_late_resume(skt); > +} > + > static void socket_remove(struct pcmcia_socket *skt) > { > dev_printk(KERN_NOTICE, &skt->dev, > Index: linux-2.6/include/pcmcia/ss.h > =================================================================== > --- linux-2.6.orig/include/pcmcia/ss.h > +++ linux-2.6/include/pcmcia/ss.h > @@ -262,6 +262,8 @@ struct pcmcia_socket { > struct device dev; > /* data internal to the socket driver */ > void *driver_data; > + /* status of the card during resume from a system sleep state */ > + int resume_status; > }; > > > @@ -280,6 +282,8 @@ extern struct pccard_resource_ops pccard > > /* socket drivers are expected to use these callbacks in their .drv struct */ > extern int pcmcia_socket_dev_suspend(struct device *dev); > +extern void pcmcia_socket_dev_early_resume(struct device *dev); > +extern void pcmcia_socket_dev_late_resume(struct device *dev); > extern int pcmcia_socket_dev_resume(struct device *dev); > > /* socket drivers use this callback in their IRQ handler */ -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
