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omap_hsmmc: ensure workqueues are empty before suspend

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Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Adrian Hunter 2009-09-22 16:44:45 -07:00 committed by Linus Torvalds
parent abb28e731a
commit a6b2240da2
1 changed files with 35 additions and 17 deletions
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52
drivers/mmc/host/omap_hsmmc.c
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@ -151,7 +151,6 @@ struct mmc_omap_host {
u32 bytesleft;
int suspended;
int irq;
int carddetect;
int use_dma, dma_ch;
int dma_line_tx, dma_line_rx;
int slot_id;
@ -761,14 +760,19 @@ static void mmc_omap_detect(struct work_struct *work)
struct mmc_omap_host *host = container_of(work, struct mmc_omap_host,
mmc_carddetect_work);
struct omap_mmc_slot_data *slot = &mmc_slot(host);
int carddetect;
if (mmc_slot(host).card_detect)
host->carddetect = slot->card_detect(slot->card_detect_irq);
else
host->carddetect = -ENOSYS;
if (host->suspended)
return;
sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
if (host->carddetect) {
if (mmc_slot(host).card_detect)
carddetect = slot->card_detect(slot->card_detect_irq);
else
carddetect = -ENOSYS;
if (carddetect) {
mmc_detect_change(host->mmc, (HZ * 200) / 1000);
} else {
mmc_host_enable(host->mmc);
@ -785,6 +789,8 @@ static irqreturn_t omap_mmc_cd_handler(int irq, void *dev_id)
{
struct mmc_omap_host *host = (struct mmc_omap_host *)dev_id;
if (host->suspended)
return IRQ_HANDLED;
schedule_work(&host->mmc_carddetect_work);
return IRQ_HANDLED;
@ -1524,30 +1530,42 @@ static int omap_mmc_suspend(struct platform_device *pdev, pm_message_t state)
return 0;
if (host) {
host->suspended = 1;
if (host->pdata->suspend) {
ret = host->pdata->suspend(&pdev->dev,
host->slot_id);
if (ret) {
dev_dbg(mmc_dev(host->mmc),
"Unable to handle MMC board"
" level suspend\n");
host->suspended = 0;
return ret;
}
}
cancel_work_sync(&host->mmc_carddetect_work);
mmc_host_enable(host->mmc);
ret = mmc_suspend_host(host->mmc, state);
if (ret == 0) {
host->suspended = 1;
OMAP_HSMMC_WRITE(host->base, ISE, 0);
OMAP_HSMMC_WRITE(host->base, IE, 0);
if (host->pdata->suspend) {
ret = host->pdata->suspend(&pdev->dev,
host->slot_id);
if (ret)
dev_dbg(mmc_dev(host->mmc),
"Unable to handle MMC board"
" level suspend\n");
}
OMAP_HSMMC_WRITE(host->base, HCTL,
OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
mmc_host_disable(host->mmc);
clk_disable(host->iclk);
clk_disable(host->dbclk);
} else
} else {
host->suspended = 0;
if (host->pdata->resume) {
ret = host->pdata->resume(&pdev->dev,
host->slot_id);
if (ret)
dev_dbg(mmc_dev(host->mmc),
"Unmask interrupt failed\n");
}
mmc_host_disable(host->mmc);
}
}
return ret;