diff options
| author | Ohad Ben-Cohen <ohad@wizery.com> | 2010-10-13 09:31:56 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-28 21:51:34 -0700 |
| commit | 63cb57e4d31311bf80639d07ba006d39651304bb (patch) | |
| tree | a3208fe36c6ff671dedaea16c94cb1ddb18a31ae | |
| parent | 414c9c2726f9aa72ee37c64e24960a6a81374c34 (diff) | |
mmc: sdio: fix SDIO suspend/resume regression
commit 1c8cf9c997a4a6b36e907c7ede5f048aeaab1644 upstream.
Fix SDIO suspend/resume regression introduced by 4c2ef25fe0b "mmc: fix
all hangs related to mmc/sd card insert/removal during suspend/resume":
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.01 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
pm_op(): platform_pm_suspend+0x0/0x5c returns -38
PM: Device pxa2xx-mci.0 failed to suspend: error -38
PM: Some devices failed to suspend
4c2ef25fe0b moved the card removal/insertion mechanism out of MMC's
suspend/resume path and into pm notifiers (mmc_pm_notify), and that
broke SDIO's expectation that mmc_suspend_host() will remove the card,
and squash the error, in case -ENOSYS is returned from the bus suspend
handler (mmc_sdio_suspend() in this case).
mmc_sdio_suspend() is using this whenever at least one of the card's SDIO
function drivers does not have suspend/resume handlers - in that case
it is agreed to force removal of the entire card.
This patch fixes this regression by trivially bringing back that part of
mmc_suspend_host(), which was removed by 4c2ef25fe0b.
Reported-and-tested-by: Sven Neumann <s.neumann@raumfeld.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/mmc/core/core.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 83e7543b55d9..2876c3d80284 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1277,6 +1277,19 @@ int mmc_suspend_host(struct mmc_host *host) if (host->bus_ops && !host->bus_dead) { if (host->bus_ops->suspend) err = host->bus_ops->suspend(host); + if (err == -ENOSYS || !host->bus_ops->resume) { + /* + * We simply "remove" the card in this case. + * It will be redetected on resume. + */ + if (host->bus_ops->remove) + host->bus_ops->remove(host); + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_release_host(host); + host->pm_flags = 0; + err = 0; + } } mmc_bus_put(host); |