MMC: S3C24XX MMC/SD driver write fixes

This patch is a workaround of some S3C2410 MMC chip bug Signed-off-by: Ben Dooks <[email protected]> Signed-off-by: Pierre Ossman <[email protected]>
mna · Jul 15, 2008 · 679f0f8 · 679f0f8
1 parent be51801
commit 679f0f8
Showing 1 changed file with 13 additions and 3 deletions.
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
@@ -461,9 +461,19 @@ static irqreturn_t s3cmci_irq(int irq, void *dev_id)
 
 	if (mci_csta & S3C2410_SDICMDSTAT_CRCFAIL) {
 		if (cmd->flags & MMC_RSP_CRC) {
-			cmd->error = -EILSEQ;
-			host->status = "error: bad command crc";
-			goto fail_transfer;
+			if (host->mrq->cmd->flags & MMC_RSP_136) {
+				dbg(host, dbg_irq,
+				    "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;