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libertas sdio: fix suspend when interface is down

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When the interface is down, the hardware is powered off.
However, the suspend handler currently tries to send host sleep commands
(when wakeup params are set) in this configuration, causing a system hang
when going into suspend (the commands will never complete).

Avoid this by detecting this situation and simply returning from
the suspend handler without doing anything special.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Daniel Drake 2012-09-03 15:49:09 -04:00 committed by John W. Linville
parent efd5d6b03b
commit f10723841e
1 changed files with 5 additions and 0 deletions
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5
drivers/net/wireless/libertas/if_sdio.c
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@ -1326,6 +1326,11 @@ static int if_sdio_suspend(struct device *dev)
mmc_pm_flag_t flags = sdio_get_host_pm_caps(func);
/* If we're powered off anyway, just let the mmc layer remove the
* card. */
if (!lbs_iface_active(card->priv))
return -ENOSYS;
dev_info(dev, "%s: suspend: PM flags = 0x%x\n",
sdio_func_id(func), flags);