mmc: core: retry CMD1 in mmc_send_op_cond() even if the ocr = 0

According to eMMC specification v5.1 section 6.4.3, we should issue
CMD1 repeatedly in the idle state until the eMMC is ready even if
the mmc_attach_mmc() calls this function with ocr = 0. Otherwise
some eMMC devices seems to enter the inactive mode after
mmc_init_card() issued CMD0 when the eMMC device is busy.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/mmc_ops.c

@@ -184,11 +184,7 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 		if (err)
 			break;
 
-		/* if we're just probing, do a single pass */
-		if (ocr == 0)
-			break;
-
-		/* otherwise wait until reset completes */
+		/* wait until reset completes */
 		if (mmc_host_is_spi(host)) {
 			if (!(cmd.resp[0] & R1_SPI_IDLE))
 				break;
@@ -200,6 +196,16 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 		err = -ETIMEDOUT;
 
 		mmc_delay(10);
+
+		/*
+		 * According to eMMC specification v5.1 section 6.4.3, we
+		 * should issue CMD1 repeatedly in the idle state until
+		 * the eMMC is ready. Otherwise some eMMC devices seem to enter
+		 * the inactive mode after mmc_init_card() issued CMD0 when
+		 * the eMMC device is busy.
+		 */
+		if (!ocr && !mmc_host_is_spi(host))
+			cmd.arg = cmd.resp[0] | BIT(30);
 	}
 
 	if (rocr && !mmc_host_is_spi(host))