diff options
Diffstat (limited to 'drivers/mmc/core/mmc_ops.c')
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 1db60be43c37..72e1f9b3ed0d 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -385,6 +385,35 @@ int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) } EXPORT_SYMBOL_GPL(mmc_send_ext_csd); +int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd) +{ + int err; + u8 *ext_csd; + + if (!card || !new_ext_csd) + return -EINVAL; + + if (!mmc_can_ext_csd(card)) + return -EOPNOTSUPP; + + /* + * As the ext_csd is so large and mostly unused, we don't store the + * raw block in mmc_card. + */ + ext_csd = kmalloc(512, GFP_KERNEL); + if (!ext_csd) + return -ENOMEM; + + err = mmc_send_ext_csd(card, ext_csd); + if (err) + kfree(ext_csd); + else + *new_ext_csd = ext_csd; + + return err; +} +EXPORT_SYMBOL_GPL(mmc_get_ext_csd); + int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) { struct mmc_command cmd = {0}; |