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Commit 679f0f8a authored by Harald Welte's avatar Harald Welte Committed by Pierre Ossman
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MMC: S3C24XX MMC/SD driver write fixes 



This patch is a workaround of some S3C2410 MMC chip bug

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent be518018

drivers/mmc/host/s3cmci.c

+13 −3
Original line number Original line Diff line number Diff line
@@ -461,9 +461,19 @@ static irqreturn_t s3cmci_irq(int irq, void *dev_id) 




	if (mci_csta & S3C2410_SDICMDSTAT_CRCFAIL) {

	if (mci_csta & S3C2410_SDICMDSTAT_CRCFAIL) {

		if (cmd->flags & MMC_RSP_CRC) {

		if (cmd->flags & MMC_RSP_CRC) {

			cmd->error = -EILSEQ;

			if (host->mrq->cmd->flags & MMC_RSP_136) {

			host->status = "error: bad command crc";

				dbg(host, dbg_irq,

			goto fail_transfer;

				    "fixup: ignore CRC fail with long rsp\n");

			} else {

				/* note, we used to fail the transfer

				 * here, but it seems that this is just

				 * the hardware getting it wrong.

				 *

				 * cmd->error = -EILSEQ;

				 * host->status = "error: bad command crc";

				 * goto fail_transfer;

				*/

			}

		}

		}





		mci_cclear |= S3C2410_SDICMDSTAT_CRCFAIL;

		mci_cclear |= S3C2410_SDICMDSTAT_CRCFAIL;