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Commit 7e9c7b64 authored by Ben Dooks's avatar Ben Dooks Committed by Pierre Ossman
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MMC: S3C24XX: Refuse incorrectly aligned transfers 



The hardware does not support any multi-block transfers
with an block-size that is not 32bit aligned. Also the driver
itself does not support single block non-32bit transfers
either.

Ensure that the s3cmci_setup_data() returns the appropriate
error if we encounter this.

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent 4dde7f75

drivers/mmc/host/s3cmci.c

+11 −0
Original line number Original line Diff line number Diff line
@@ -807,6 +807,17 @@ static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data) 
		return 0;

		return 0;

	}

	}





	if ((data->blksz & 3) != 0) {

		/* We cannot deal with unaligned blocks with more than

		 * one block being transfered. */



		if (data->blocks > 1)

			return -EINVAL;



		/* No support yet for non-word block transfers. */

		return -EINVAL;

	}



	while (readl(host->base + S3C2410_SDIDSTA) &

	while (readl(host->base + S3C2410_SDIDSTA) &

	       (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) {

	       (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) {