From f923381741b5a56115c5860a593e94539c5bbc8f Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Wed, 3 Apr 2013 11:41:52 -0400
Subject: [PATCH] Make grub_efidisk_get_device_name() work on 4K native disks.
When we have 4kB sectors instead of 512b sectors, hd.partition_start and
grub_partition_get_start() won't match - the latter assumes 512-byte
sectors, and the former gives us the correct number based on the
physical media's sector size. So when we have to compare them, we need
to compensate.
Signed-off-by: Peter Jones <grub2-owner@fedoraproject.org>
---
grub-core/disk/efi/efidisk.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/grub-core/disk/efi/efidisk.c b/grub-core/disk/efi/efidisk.c
index 77ab5b0..a905b52 100644
--- a/grub-core/disk/efi/efidisk.c
+++ b/grub-core/disk/efi/efidisk.c
@@ -791,11 +791,13 @@ grub_efidisk_get_device_name (grub_efi_handle_t *handle)
auto int find_partition (grub_disk_t disk, const grub_partition_t part);
/* Find the identical partition. */
- int find_partition (grub_disk_t disk __attribute__ ((unused)),
- const grub_partition_t part)
+ int find_partition (grub_disk_t disk, const grub_partition_t part)
{
- if (grub_partition_get_start (part) == hd.partition_start
- && grub_partition_get_len (part) == hd.partition_size)
+ struct grub_efidisk_data *d = disk->data;
+ grub_efi_block_io_media_t *m = d->block_io->media;
+
+ if (grub_partition_get_start (part) / (m->block_size / 512) == hd.partition_start
+ && grub_partition_get_len (part) / (m->block_size / 512) == hd.partition_size)
{
partition_name = grub_partition_get_name (part);
return 1;
--
1.8.1.4