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92 lines
2.0 KiB
Diff
92 lines
2.0 KiB
Diff
From 39e3d37b1f7194277b8a3ea3536a67ec2d24491e Mon Sep 17 00:00:00 2001
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From: San Mehat <san@android.com>
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Date: Thu, 4 Dec 2008 11:18:00 -0800
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Subject: [PATCH 100/134] mmc: sd: Add retries in re-detection
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Signed-off-by: San Mehat <san@android.com>
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---
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drivers/mmc/core/sd.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
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1 files changed, 43 insertions(+), 3 deletions(-)
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--- a/drivers/mmc/core/sd.c
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+++ b/drivers/mmc/core/sd.c
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@@ -558,18 +558,37 @@ static void mmc_sd_remove(struct mmc_hos
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*/
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static void mmc_sd_detect(struct mmc_host *host)
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{
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- int err;
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+ int err = 0;
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+#ifdef CONFIG_MMC_PARANOID_SD_INIT
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+ int retries = 5;
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+#endif
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BUG_ON(!host);
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BUG_ON(!host->card);
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-
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+
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mmc_claim_host(host);
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/*
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* Just check if our card has been removed.
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*/
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+#ifdef CONFIG_MMC_PARANOID_SD_INIT
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+ while(retries) {
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+ err = mmc_send_status(host->card, NULL);
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+ printk("%s(%s): err = %d\n", __func__, mmc_hostname(host), err);
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+ if (err) {
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+ retries--;
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+ udelay(5);
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+ continue;
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+ }
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+ break;
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+ }
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+ if (!retries) {
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+ printk(KERN_ERR "%s(%s): Unable to re-detect card (%d)\n",
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+ __func__, mmc_hostname(host), err);
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+ }
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+#else
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err = mmc_send_status(host->card, NULL);
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-
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+#endif
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mmc_release_host(host);
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if (err) {
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@@ -664,6 +683,9 @@ static const struct mmc_bus_ops mmc_sd_o
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int mmc_attach_sd(struct mmc_host *host, u32 ocr)
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{
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int err;
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+#ifdef CONFIG_MMC_PARANOID_SD_INIT
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+ int retries;
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+#endif
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BUG_ON(!host);
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WARN_ON(!host->claimed);
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@@ -712,9 +734,27 @@ int mmc_attach_sd(struct mmc_host *host,
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/*
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* Detect and init the card.
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*/
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+#ifdef CONFIG_MMC_PARANOID_SD_INIT
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+ retries = 5;
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+ while (retries) {
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+ err = mmc_sd_init_card(host, host->ocr, NULL);
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+ if (err) {
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+ retries--;
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+ continue;
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+ }
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+ break;
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+ }
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+
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+ if (!retries) {
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+ printk(KERN_ERR "%s: mmc_sd_init_card() failure (err = %d)\n",
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+ mmc_hostname(host), err);
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+ goto err;
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+ }
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+#else
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err = mmc_sd_init_card(host, host->ocr, NULL);
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if (err)
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goto err;
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+#endif
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mmc_release_host(host);
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