mmc: allow upper layers to know immediately if card has been removed
Add a function mmc_detect_card_removed() which upper layers can use to
determine immediately if a card has been removed. This function should
be called after an I/O request fails so that all queued I/O requests
can be errored out immediately instead of waiting for the card device
to be removed.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index d240427..fc1059b 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1105,6 +1105,14 @@
}
/*
+ * Card detection - card is alive.
+ */
+static int mmc_alive(struct mmc_host *host)
+{
+ return mmc_send_status(host->card, NULL);
+}
+
+/*
* Card detection callback from host.
*/
static void mmc_detect(struct mmc_host *host)
@@ -1119,7 +1127,7 @@
/*
* Just check if our card has been removed.
*/
- err = mmc_send_status(host->card, NULL);
+ err = _mmc_detect_card_removed(host);
mmc_release_host(host);
@@ -1224,6 +1232,7 @@
.suspend = NULL,
.resume = NULL,
.power_restore = mmc_power_restore,
+ .alive = mmc_alive,
};
static const struct mmc_bus_ops mmc_ops_unsafe = {
@@ -1234,6 +1243,7 @@
.suspend = mmc_suspend,
.resume = mmc_resume,
.power_restore = mmc_power_restore,
+ .alive = mmc_alive,
};
static void mmc_attach_bus_ops(struct mmc_host *host)
