diff options
Diffstat (limited to 'target/linux/goldfish/patches-2.6.30/0100-mmc-sd-Add-retries-in-re-detection.patch')
| -rw-r--r-- | target/linux/goldfish/patches-2.6.30/0100-mmc-sd-Add-retries-in-re-detection.patch | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/target/linux/goldfish/patches-2.6.30/0100-mmc-sd-Add-retries-in-re-detection.patch b/target/linux/goldfish/patches-2.6.30/0100-mmc-sd-Add-retries-in-re-detection.patch new file mode 100644 index 0000000..090e9e6 --- /dev/null +++ b/target/linux/goldfish/patches-2.6.30/0100-mmc-sd-Add-retries-in-re-detection.patch @@ -0,0 +1,91 @@ +From 39e3d37b1f7194277b8a3ea3536a67ec2d24491e Mon Sep 17 00:00:00 2001 +From: San Mehat <san@android.com> +Date: Thu, 4 Dec 2008 11:18:00 -0800 +Subject: [PATCH 100/134] mmc: sd: Add retries in re-detection + +Signed-off-by: San Mehat <san@android.com> +--- + drivers/mmc/core/sd.c | 46 +++++++++++++++++++++++++++++++++++++++++++--- + 1 files changed, 43 insertions(+), 3 deletions(-) + +--- a/drivers/mmc/core/sd.c ++++ b/drivers/mmc/core/sd.c +@@ -558,18 +558,37 @@ static void mmc_sd_remove(struct mmc_hos + */ + static void mmc_sd_detect(struct mmc_host *host) + { +- int err; ++ int err = 0; ++#ifdef CONFIG_MMC_PARANOID_SD_INIT ++ int retries = 5; ++#endif + + BUG_ON(!host); + BUG_ON(!host->card); +- ++ + mmc_claim_host(host); + + /* + * Just check if our card has been removed. + */ ++#ifdef CONFIG_MMC_PARANOID_SD_INIT ++ while(retries) { ++ err = mmc_send_status(host->card, NULL); ++ printk("%s(%s): err = %d\n", __func__, mmc_hostname(host), err); ++ if (err) { ++ retries--; ++ udelay(5); ++ continue; ++ } ++ break; ++ } ++ if (!retries) { ++ printk(KERN_ERR "%s(%s): Unable to re-detect card (%d)\n", ++ __func__, mmc_hostname(host), err); ++ } ++#else + err = mmc_send_status(host->card, NULL); +- ++#endif + mmc_release_host(host); + + if (err) { +@@ -664,6 +683,9 @@ static const struct mmc_bus_ops mmc_sd_o + int mmc_attach_sd(struct mmc_host *host, u32 ocr) + { + int err; ++#ifdef CONFIG_MMC_PARANOID_SD_INIT ++ int retries; ++#endif + + BUG_ON(!host); + WARN_ON(!host->claimed); +@@ -712,9 +734,27 @@ int mmc_attach_sd(struct mmc_host *host, + /* + * Detect and init the card. + */ ++#ifdef CONFIG_MMC_PARANOID_SD_INIT ++ retries = 5; ++ while (retries) { ++ err = mmc_sd_init_card(host, host->ocr, NULL); ++ if (err) { ++ retries--; ++ continue; ++ } ++ break; ++ } ++ ++ if (!retries) { ++ printk(KERN_ERR "%s: mmc_sd_init_card() failure (err = %d)\n", ++ mmc_hostname(host), err); ++ goto err; ++ } ++#else + err = mmc_sd_init_card(host, host->ocr, NULL); + if (err) + goto err; ++#endif + + mmc_release_host(host); + |