[U-Boot] Possible MMC subsystem bug

[Marek Vasut <marex@denx.de>]

Hi Andy,

I was going through the MMC code, trying to get Phison 8007 SD-to-NAND bridge 
working (don't ask please, this chip's sole existence defies any logic).

So, I found the following code and I was wondering if the following patch is not 
needed. Maybe my brain is just giving up though. Give it some thought please and 
let me know, thanks!

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 72e8ce6..94926ca 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -475,8 +474,11 @@ static int sd_send_op_cond(struct mmc *mmc)
                if (err)
                        return err;
 
+               if (!(cmd.response[0] & OCR_BUSY))
+                       break;
+
                udelay(1000);
-       } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
+       } while (timeout--);
 
        if (timeout <= 0)
                return UNUSABLE_ERR;