omap_hsmmc: Allow cover switch to cause rescan

Allow a cover switch to be used to cause a rescan of the
MMC slot.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index fd1657a..f3e4e0f 100644 (file)
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -571,7 +571,10 @@ static void mmc_omap_detect(struct work_struct *work)
                                                mmc_carddetect_work);
        struct omap_mmc_slot_data *slot = &mmc_slot(host);
 
-       host->carddetect = slot->card_detect(slot->card_detect_irq);
+       if (mmc_slot(host).card_detect)
+               host->carddetect = slot->card_detect(slot->card_detect_irq);
+       else
+               host->carddetect = -ENOSYS;
 
        sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
        if (host->carddetect) {
@@ -1089,7 +1092,7 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
        }
 
        /* Request IRQ for card detect */
-       if ((mmc_slot(host).card_detect_irq) && (mmc_slot(host).card_detect)) {
+       if ((mmc_slot(host).card_detect_irq)) {
                ret = request_irq(mmc_slot(host).card_detect_irq,
                                  omap_mmc_cd_handler,
                                  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING
@@ -1112,8 +1115,8 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
                if (ret < 0)
                        goto err_slot_name;
        }
-       if (mmc_slot(host).card_detect_irq && mmc_slot(host).card_detect &&
-                       host->pdata->slots[host->slot_id].get_cover_state) {
+       if (mmc_slot(host).card_detect_irq &&
+           host->pdata->slots[host->slot_id].get_cover_state) {
                ret = device_create_file(&mmc->class_dev,
                                        &dev_attr_cover_switch);
                if (ret < 0)