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pcmcia: delay re-scanning and re-querying of PCMCIA bus

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After a CIS update -- or the finalization of the resource database --,
proceed with the re-scanning or re-querying of PCMCIA cards only in
a separate thread to avoid deadlocks.

Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski
2010-01-17 19:30:53 +01:00
parent f971dbd5da
commit af461fc187
5 changed files with 59 additions and 53 deletions
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8
drivers/pcmcia/cs.c
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@@ -728,6 +728,11 @@ 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 +788,8 @@ 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)
{