[PATCH] mmc: tmio: Always check for errors after receiving an IRQ

[Marek Vasut]

Unconditionally check for errors even after successful reception
of IRQ flag, since the hardware may set both an IRQ completion
flag and an error flag at the same time.

This mode of failure happens in case of an error during transfer,
in which case the hardware may set the expected IRQ completion
flag as well as error flags. The later is currently not checked
by the driver and such an error is not detected. Improve the
error detection.

Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
---
Cc: Jaehoon Chung <jh80.chung at samsung.com>
Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
Cc: Peng Fan <peng.fan at nxp.com>
---
 drivers/mmc/tmio-common.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c
index d1e26815996..83eaf361f0c 100644
--- a/drivers/mmc/tmio-common.c
+++ b/drivers/mmc/tmio-common.c
@@ -122,7 +122,10 @@ static int tmio_sd_wait_for_irq(struct udevice *dev, struct mmc_cmd *cmd,
 	long wait = 1000000;
 	int ret;
 
-	while (!(tmio_sd_readl(priv, reg) & flag)) {
+	while (true) {
+		if (tmio_sd_readl(priv, reg) & flag)
+			return tmio_sd_check_error(dev, cmd);
+
 		if (wait-- < 0) {
 			dev_err(dev, "timeout\n");
 			return -ETIMEDOUT;
-- 
2.42.0