MMC: S3C24XX: Add media presence test to request handling.
Ensure that we have physical media present before attempting to
send a request to a card. This ensures that we do not get flooded
by errors from commands that can never be completed timing out.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index 6f1b474..62d73d3 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -984,6 +984,18 @@
enable_irq(host->irq);
}
+static int s3cmci_card_present(struct s3cmci_host *host)
+{
+ struct s3c24xx_mci_pdata *pdata = host->pdata;
+ int ret;
+
+ if (pdata->gpio_detect == 0)
+ return -ENOSYS;
+
+ ret = s3c2410_gpio_getpin(pdata->gpio_detect) ? 0 : 1;
+ return ret ^ pdata->detect_invert;
+}
+
static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct s3cmci_host *host = mmc_priv(mmc);
@@ -992,7 +1004,12 @@
host->cmd_is_stop = 0;
host->mrq = mrq;
- s3cmci_send_request(mmc);
+ if (s3cmci_card_present(host) == 0) {
+ dbg(host, dbg_err, "%s: no medium present\n", __func__);
+ host->mrq->cmd->error = -ENOMEDIUM;
+ mmc_request_done(mmc, mrq);
+ } else
+ s3cmci_send_request(mmc);
}
static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
