mmc: core: Allows to override the timeout value for ioctl() path

Occasionally, user-land applications initiate longer timeout values for certain commands
through ioctl() system call. But so far we are still using a fixed timeout of 10 seconds
in mmc_poll_for_busy() on the ioctl() path, even if a custom timeout is specified in the
userspace application. This patch allows custom timeout values to override this default
timeout values on the ioctl path.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Acked-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220423221623.1074556-3-huobean@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: beanhuo

drivers/mmc/core/block.c

@@ -609,11 +609,11 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
 
 	if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
 		/*
-		 * Ensure RPMB/R1B command has completed by polling CMD13
-		 * "Send Status".
+		 * Ensure RPMB/R1B command has completed by polling CMD13 "Send Status". Here we
+		 * allow to override the default timeout value if a custom timeout is specified.
 		 */
-		err = mmc_poll_for_busy(card, MMC_BLK_TIMEOUT_MS, false,
-					MMC_BUSY_IO);
+		err = mmc_poll_for_busy(card, idata->ic.cmd_timeout_ms ? : MMC_BLK_TIMEOUT_MS,
+					false, MMC_BUSY_IO);
 	}
 
 	return err;