mmc: Fix sd/sdio/mmc initialization frequency retries
Rewrite and clean up mmc_rescan() to properly retry frequencies lower
than 400kHz. Failures can happen both in sd_send_* calls and
mmc_attach_*. Break out "mmc_rescan_try_freq" from the frequency
selection loop. Symmetrize claim/release logic in mmc_attach_* API,
and move the sd_send_* calls there to make mmc_rescan easier to read.
Signed-off-by: Andy Ross <andy.ross@windriver.com>
Reviewed-and-Tested-by: Hein Tibosch <hein_tibosch@yahoo.es>
Reviewed-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index de062eb..d18c32b 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -764,13 +764,18 @@
/*
* Starting point for SD card init.
*/
-int mmc_attach_sd(struct mmc_host *host, u32 ocr)
+int mmc_attach_sd(struct mmc_host *host)
{
int err;
+ u32 ocr;
BUG_ON(!host);
WARN_ON(!host->claimed);
+ err = mmc_send_app_op_cond(host, 0, &ocr);
+ if (err)
+ return err;
+
mmc_sd_attach_bus_ops(host);
if (host->ocr_avail_sd)
host->ocr_avail = host->ocr_avail_sd;
@@ -823,20 +828,20 @@
goto err;
mmc_release_host(host);
-
err = mmc_add_card(host->card);
+ mmc_claim_host(host);
if (err)
goto remove_card;
return 0;
remove_card:
+ mmc_release_host(host);
mmc_remove_card(host->card);
host->card = NULL;
mmc_claim_host(host);
err:
mmc_detach_bus(host);
- mmc_release_host(host);
printk(KERN_ERR "%s: error %d whilst initialising SD card\n",
mmc_hostname(host), err);