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Commit 3d1343b5 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  mmc_spi: Fix mmc-over-spi regression
  mmc: use common byte swap macros
  mmc: fix cid and csd byte order
  at91_mci: Fix bad reference
parents a2508c08 460cd058

drivers/mmc/core/mmc_ops.c

+20 −2
Original line number Diff line number Diff line
@@ -267,15 +267,26 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, 


int mmc_send_csd(struct mmc_card *card, u32 *csd)

{

	int ret, i;



	if (!mmc_host_is_spi(card->host))

		return mmc_send_cxd_native(card->host, card->rca << 16,

				csd, MMC_SEND_CSD);



	return mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16);

	ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16);

	if (ret)

		return ret;



	for (i = 0;i < 4;i++)

		csd[i] = be32_to_cpu(csd[i]);



	return 0;

}



int mmc_send_cid(struct mmc_host *host, u32 *cid)

{

	int ret, i;



	if (!mmc_host_is_spi(host)) {

		if (!host->card)

			return -EINVAL;
@@ -283,7 +294,14 @@ int mmc_send_cid(struct mmc_host *host, u32 *cid) 
				cid, MMC_SEND_CID);

	}



	return mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16);

	ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16);

	if (ret)

		return ret;



	for (i = 0;i < 4;i++)

		cid[i] = be32_to_cpu(cid[i]);



	return 0;

}



int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)

drivers/mmc/core/sd_ops.c

+2 −2
Original line number Diff line number Diff line
@@ -294,8 +294,8 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr) 
	if (data.error)

		return data.error;



	scr[0] = ntohl(scr[0]);

	scr[1] = ntohl(scr[1]);

	scr[0] = be32_to_cpu(scr[0]);

	scr[1] = be32_to_cpu(scr[1]);



	return 0;

}

drivers/mmc/host/au1xmmc.c

+2 −2
Original line number Diff line number Diff line
@@ -212,12 +212,12 @@ static int au1xmmc_send_command(struct au1xmmc_host *host, int wait, 
	}



	if (data) {

		if (flags & MMC_DATA_READ) {

		if (data->flags & MMC_DATA_READ) {

			if (data->blocks > 1)

				mmccmd |= SD_CMD_CT_4;

			else

				mmccmd |= SD_CMD_CT_2;

		} else if (flags & MMC_DATA_WRITE) {

		} else if (data->flags & MMC_DATA_WRITE) {

			if (data->blocks > 1)

				mmccmd |= SD_CMD_CT_3;

			else

drivers/mmc/host/mmc_spi.c

+33 −19
Original line number Diff line number Diff line
@@ -1165,6 +1165,23 @@ mmc_spi_detect_irq(int irq, void *mmc) 
	return IRQ_HANDLED;

}



struct count_children {

	unsigned	n;

	struct bus_type	*bus;

};



static int maybe_count_child(struct device *dev, void *c)

{

	struct count_children *ccp = c;



	if (dev->bus == ccp->bus) {

		if (ccp->n)

			return -EBUSY;

		ccp->n++;

	}

	return 0;

}



static int mmc_spi_probe(struct spi_device *spi)

{

	void			*ones;
@@ -1188,33 +1205,30 @@ static int mmc_spi_probe(struct spi_device *spi) 
		return status;

	}



	/* We can use the bus safely iff nobody else will interfere with

	 * us.  That is, either we have the experimental exclusive access

	 * primitives ... or else there's nobody to share it with.

	/* We can use the bus safely iff nobody else will interfere with us.

	 * Most commands consist of one SPI message to issue a command, then

	 * several more to collect its response, then possibly more for data

	 * transfer.  Clocking access to other devices during that period will

	 * corrupt the command execution.

	 *

	 * Until we have software primitives which guarantee non-interference,

	 * we'll aim for a hardware-level guarantee.

	 *

	 * REVISIT we can't guarantee another device won't be added later...

	 */

	if (spi->master->num_chipselect > 1) {

		struct device	*parent = spi->dev.parent;

		struct count_children cc;



		/* If there are multiple devices on this bus, we

		 * can't proceed.

		 */

		spin_lock(&parent->klist_children.k_lock);

		if (parent->klist_children.k_list.next

				!= parent->klist_children.k_list.prev)

			status = -EMLINK;

		else

			status = 0;

		spin_unlock(&parent->klist_children.k_lock);

		cc.n = 0;

		cc.bus = spi->dev.bus;

		status = device_for_each_child(spi->dev.parent, &cc,

				maybe_count_child);

		if (status < 0) {

			dev_err(&spi->dev, "can't share SPI bus\n");

			return status;

		}



		/* REVISIT we can't guarantee another device won't

		 * be added later.  It's uncommon though ... for now,

		 * work as if this is safe.

		 */

		dev_warn(&spi->dev, "ASSUMING unshared SPI bus!\n");

		dev_warn(&spi->dev, "ASSUMING SPI bus stays unshared!\n");

	}



	/* We need a supply of ones to transmit.  This is the only time