efi_loader: disk: Fix CONFIG_BLK breakage

When using CONFIG_BLK, there were 2 issues:

  1) The name we generate the device with has to match the
     name we set in efi_set_bootdev()

  2) The device we pass into our block functions was wrong,
     we should not rediscover it but just use the already known
     pointer.

This patch fixes both issues.

Signed-off-by: Alexander Graf <agraf@suse.de>

cmd/bootefi.c

@@ -8,6 +8,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <dm/device.h>
 #include <efi_loader.h>
 #include <errno.h>
 #include <libfdt.h>
@@ -265,18 +266,30 @@ void efi_set_bootdev(const char *dev, const char *devnr, const char *path)
 	char devname[32] = { 0 }; /* dp->str is u16[32] long */
 	char *colon;
 
-	/* Assemble the condensed device name we use in efi_disk.c */
-	snprintf(devname, sizeof(devname), "%s%s", dev, devnr);
+#if defined(CONFIG_BLK) || defined(CONFIG_ISO_PARTITION)
+	desc = blk_get_dev(dev, simple_strtol(devnr, NULL, 10));
+#endif
+
+#ifdef CONFIG_BLK
+	if (desc) {
+		snprintf(devname, sizeof(devname), "%s", desc->bdev->name);
+	} else
+#endif
+
+	{
+		/* Assemble the condensed device name we use in efi_disk.c */
+		snprintf(devname, sizeof(devname), "%s%s", dev, devnr);
+	}
+
 	colon = strchr(devname, ':');
 
 #ifdef CONFIG_ISO_PARTITION
 	/* For ISOs we create partition block devices */
-	desc = blk_get_dev(dev, simple_strtol(devnr, NULL, 10));
 	if (desc && (desc->type != DEV_TYPE_UNKNOWN) &&
 	    (desc->part_type == PART_TYPE_ISO)) {
 		if (!colon)
-			snprintf(devname, sizeof(devname), "%s%s:1", dev,
-				 devnr);
+			snprintf(devname, sizeof(devname), "%s:1", devname);
+
 		colon = NULL;
 	}
 #endif

lib/efi_loader/efi_disk.c

@@ -31,6 +31,8 @@ struct efi_disk_obj {
 	struct efi_device_path_file_path *dp;
 	/* Offset into disk for simple partitions */
 	lbaint_t offset;
+	/* Internal block device */
+	const struct blk_desc *desc;
 };
 
 static efi_status_t efi_disk_open_block(void *handle, efi_guid_t *protocol,
@@ -78,8 +80,7 @@ static efi_status_t EFIAPI efi_disk_rw_blocks(struct efi_block_io *this,
 	unsigned long n;
 
 	diskobj = container_of(this, struct efi_disk_obj, ops);
-	if (!(desc = blk_get_dev(diskobj->ifname, diskobj->dev_index)))
-		return EFI_EXIT(EFI_DEVICE_ERROR);
+	desc = (struct blk_desc *) diskobj->desc;
 	blksz = desc->blksz;
 	blocks = buffer_size / blksz;
 	lba += diskobj->offset;
@@ -213,6 +214,7 @@ static void efi_disk_add_dev(const char *name,
 	diskobj->ifname = if_typename;
 	diskobj->dev_index = dev_index;
 	diskobj->offset = offset;
+	diskobj->desc = desc;
 
 	/* Fill in EFI IO Media info (for read/write callbacks) */
 	diskobj->media.removable_media = desc->removable;
@@ -240,7 +242,8 @@ static void efi_disk_add_dev(const char *name,
 
 static int efi_disk_create_eltorito(struct blk_desc *desc,
 				    const char *if_typename,
-				    int diskid)
+				    int diskid,
+				    const char *pdevname)
 {
 	int disks = 0;
 #ifdef CONFIG_ISO_PARTITION
@@ -252,8 +255,8 @@ static int efi_disk_create_eltorito(struct blk_desc *desc,
 		return 0;
 
 	while (!part_get_info(desc, part, &info)) {
-		snprintf(devname, sizeof(devname), "%s%d:%d", if_typename,
-			 diskid, part);
+		snprintf(devname, sizeof(devname), "%s:%d", pdevname,
+			 part);
 		efi_disk_add_dev(devname, if_typename, desc, diskid,
 				 info.start);
 		part++;
@@ -296,7 +299,7 @@ int efi_disk_register(void)
 		* so let's create them here
 		*/
 		disks += efi_disk_create_eltorito(desc, if_typename,
-						  desc->devnum);
+						  desc->devnum, dev->name);
 	}
 #else
 	int i, if_type;
@@ -331,7 +334,8 @@ int efi_disk_register(void)
 			 * El Torito images show up as block devices
 			 * in an EFI world, so let's create them here
 			 */
-			disks += efi_disk_create_eltorito(desc, if_typename, i);
+			disks += efi_disk_create_eltorito(desc, if_typename,
+							  i, devname);
 		}
 	}
 #endif