mmc: check error bits before command completion

Some controllers signal "command complete" even on failures (which
they are allowed to do according to the spec). Make sure we check
the error bits first so we don't get any false positives.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

drivers/mmc/host/sdhci.c

@@ -922,20 +922,17 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 		return;
 	}
 
-	if (intmask & SDHCI_INT_RESPONSE)
-		sdhci_finish_command(host);
-	else {
 	if (intmask & SDHCI_INT_TIMEOUT)
 		host->cmd->error = MMC_ERR_TIMEOUT;
 	else if (intmask & SDHCI_INT_CRC)
 		host->cmd->error = MMC_ERR_BADCRC;
 	else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
 		host->cmd->error = MMC_ERR_FAILED;
-		else
-			host->cmd->error = MMC_ERR_INVALID;
 
+	if (host->cmd->error != MMC_ERR_NONE)
 		tasklet_schedule(&host->finish_tasklet);
-	}
+	else if (intmask & SDHCI_INT_RESPONSE)
+		sdhci_finish_command(host);
 }
 
 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)