--- zzzz-none-000/linux-4.9.279/drivers/mmc/core/bus.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/mmc/core/bus.c	2023-02-08 11:43:42.000000000 +0000
@@ -10,6 +10,10 @@
  *
  *  MMC card bus driver model
  */
+/*
+ * Includes Intel Corporation's changes/modifications dated: 2011, 2017, 2018.
+ * Changed/modified portions - Copyright (c) 2011-2018, Intel Corporation.
+ */
 
 #include <linux/export.h>
 #include <linux/device.h>
@@ -132,6 +136,16 @@
 	struct mmc_host *host = card->host;
 	int ret;
 
+	/*
+	 * When typing 'reboot' on Atom shell, Atom is going down (and turn off
+	 * the eMMC) At the end it notify to the PMC on the reboot request,
+	 * then the PMC notify to the ARM, with RSWARN message,
+	 * then the ARM start the reboot process, but every access
+	 * to eMMC is failing. This work around will not turn off the eMMC
+	 * if the capability is set
+	 */
+	if (host->caps2 & MMC_CAP2_NO_SHUTDOWN_BUS)
+		return;
 	if (dev->driver && drv->shutdown)
 		drv->shutdown(card);