Merge tag 'mmc-merge-for-3.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc

MMC highlights for 3.3:

Core:
 * Support for the HS200 high-speed eMMC mode.
 * Support SDIO 3.0 Ultra High Speed cards.
 * Kill pending block requests immediately if card is removed.
 * Enable the eMMC feature for locking boot partitions read-only
   until next power on, exposed via sysfs.

Drivers:
 * Runtime PM support for Intel Medfield SDIO.
 * Suspend/resume support for sdhci-spear.
 * sh-mmcif now processes requests asynchronously.

* tag 'mmc-merge-for-3.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (58 commits)
  mmc: fix a deadlock between system suspend and MMC block IO
  mmc: sdhci: restore the enabled dma when do reset all
  mmc: dw_mmc: miscaculated the fifo-depth with wrong bit operation
  mmc: host: Adds support for eMMC 4.5 HS200 mode
  mmc: core: HS200 mode support for eMMC 4.5
  mmc: dw_mmc: fixed wrong bit operation for SDMMC_GET_FCNT()
  mmc: core: Separate the timeout value for cache-ctrl
  mmc: sdhci-spear: Fix compilation error
  mmc: sdhci: Deal with failure case in sdhci_suspend_host
  mmc: dw_mmc: Clear the DDR mode for non-DDR
  mmc: sd: Fix SDR12 timing regression
  mmc: sdhci: Fix tuning timer incorrect setting when suspending host
  mmc: core: Add option to prevent eMMC sleep command
  mmc: omap_hsmmc: use threaded irq handler for card-detect.
  mmc: sdhci-pci: enable runtime PM for Medfield SDIO
  mmc: sdhci: Always pass clock request value zero to set_clock host op
  mmc: sdhci-pci: remove SDHCI_QUIRK2_OWN_CARD_DETECTION
  mmc: sdhci-pci: get gpio numbers from platform data
  mmc: sdhci-pci: add platform data
  mmc: sdhci: prevent card detection activity for non-removable cards
  ...

3 files changed, 198 insertions, 55 deletions

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 1e0e27cbe98..0cad48a284a 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -107,6 +107,8 @@ struct mmc_blk_data {
          */
         unsigned int    part_curr;
         struct device_attribute force_ro;
+        struct device_attribute power_ro_lock;
+        int     area_type;
 };
 
 static DEFINE_MUTEX(open_lock);
@@ -119,6 +121,7 @@ enum mmc_blk_status {
         MMC_BLK_ABORT,
         MMC_BLK_DATA_ERR,
         MMC_BLK_ECC_ERR,
+        MMC_BLK_NOMEDIUM,
 };
 
 module_param(perdev_minors, int, 0444);
@@ -165,6 +168,70 @@ static void mmc_blk_put(struct mmc_blk_data *md)
         mutex_unlock(&open_lock);
 }
 
+static ssize_t power_ro_lock_show(struct device *dev,
+                struct device_attribute *attr, char *buf)
+{
+        int ret;
+        struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
+        struct mmc_card *card = md->queue.card;
+        int locked = 0;
+
+        if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
+                locked = 2;
+        else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
+                locked = 1;
+
+        ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
+
+        return ret;
+}
+
+static ssize_t power_ro_lock_store(struct device *dev,
+                struct device_attribute *attr, const char *buf, size_t count)
+{
+        int ret;
+        struct mmc_blk_data *md, *part_md;
+        struct mmc_card *card;
+        unsigned long set;
+
+        if (kstrtoul(buf, 0, &set))
+                return -EINVAL;
+
+        if (set != 1)
+                return count;
+
+        md = mmc_blk_get(dev_to_disk(dev));
+        card = md->queue.card;
+
+        mmc_claim_host(card->host);
+
+        ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
+                                card->ext_csd.boot_ro_lock |
+                                EXT_CSD_BOOT_WP_B_PWR_WP_EN,
+                                card->ext_csd.part_time);
+        if (ret)
+                pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
+        else
+                card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
+
+        mmc_release_host(card->host);
+
+        if (!ret) {
+                pr_info("%s: Locking boot partition ro until next power on\n",
+                        md->disk->disk_name);
+                set_disk_ro(md->disk, 1);
+
+                list_for_each_entry(part_md, &md->part, part)
+                        if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
+                                pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
+                                set_disk_ro(part_md->disk, 1);
+                        }
+        }
+
+        mmc_blk_put(md);
+        return count;
+}
+
 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
                              char *buf)
 {
@@ -266,6 +333,9 @@ static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
                 goto idata_err;
         }
 
+        if (!idata->buf_bytes)
+                return idata;
+
         idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
         if (!idata->buf) {
                 err = -ENOMEM;
@@ -312,25 +382,6 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
         if (IS_ERR(idata))
                 return PTR_ERR(idata);
 
-        cmd.opcode = idata->ic.opcode;
-        cmd.arg = idata->ic.arg;
-        cmd.flags = idata->ic.flags;
-
-        data.sg = &sg;
-        data.sg_len = 1;
-        data.blksz = idata->ic.blksz;
-        data.blocks = idata->ic.blocks;
-
-        sg_init_one(data.sg, idata->buf, idata->buf_bytes);
-
-        if (idata->ic.write_flag)
-                data.flags = MMC_DATA_WRITE;
-        else
-                data.flags = MMC_DATA_READ;
-
-        mrq.cmd = &cmd;
-        mrq.data = &data;
-
         md = mmc_blk_get(bdev->bd_disk);
         if (!md) {
                 err = -EINVAL;
@@ -343,6 +394,48 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
                 goto cmd_done;
         }
 
+        cmd.opcode = idata->ic.opcode;
+        cmd.arg = idata->ic.arg;
+        cmd.flags = idata->ic.flags;
+
+        if (idata->buf_bytes) {
+                data.sg = &sg;
+                data.sg_len = 1;
+                data.blksz = idata->ic.blksz;
+                data.blocks = idata->ic.blocks;
+
+                sg_init_one(data.sg, idata->buf, idata->buf_bytes);
+
+                if (idata->ic.write_flag)
+                        data.flags = MMC_DATA_WRITE;
+                else
+                        data.flags = MMC_DATA_READ;
+
+                /* data.flags must already be set before doing this. */
+                mmc_set_data_timeout(&data, card);
+
+                /* Allow overriding the timeout_ns for empirical tuning. */
+                if (idata->ic.data_timeout_ns)
+                        data.timeout_ns = idata->ic.data_timeout_ns;
+
+                if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
+                        /*
+                         * Pretend this is a data transfer and rely on the
+                         * host driver to compute timeout.  When all host
+                         * drivers support cmd.cmd_timeout for R1B, this
+                         * can be changed to:
+                         *
+                         *     mrq.data = NULL;
+                         *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
+                         */
+                        data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
+                }
+
+                mrq.data = &data;
+        }
+
+        mrq.cmd = &cmd;
+
         mmc_claim_host(card->host);
 
         if (idata->ic.is_acmd) {
@@ -351,24 +444,6 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
                         goto cmd_rel_host;
         }
 
-        /* data.flags must already be set before doing this. */
-        mmc_set_data_timeout(&data, card);
-        /* Allow overriding the timeout_ns for empirical tuning. */
-        if (idata->ic.data_timeout_ns)
-                data.timeout_ns = idata->ic.data_timeout_ns;
-
-        if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
-                /*
-                 * Pretend this is a data transfer and rely on the host driver