Commit 57881dd9 authored by Suzuki K P's avatar Suzuki K P Committed by Linus Torvalds

[PATCH] Fix check_partition routines

check_partition() stops its probe once it hits an I/O error from the
partition checkers.  This would prevent the actual partition checker
getting a chance to verify the partition.

So this patch lets check_partition() continue probing untill it hits a
success while recording the I/O error which might have been reported by the
checking routines.

Also, it does some cleanup of the partition methods for ibm, atari and
amiga to return -1 upon hitting an I/O error.
Signed-off-by: default avatarSuzuki K P <suzuki@in.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 5127d002
......@@ -43,6 +43,7 @@ amiga_partition(struct parsed_partitions *state, struct block_device *bdev)
if (warn_no_part)
printk("Dev %s: unable to read RDB block %d\n",
bdevname(bdev, b), blk);
res = -1;
goto rdb_done;
}
if (*(__be32 *)data != cpu_to_be32(IDNAME_RIGIDDISK))
......@@ -79,6 +80,7 @@ amiga_partition(struct parsed_partitions *state, struct block_device *bdev)
if (warn_no_part)
printk("Dev %s: unable to read partition block %d\n",
bdevname(bdev, b), blk);
res = -1;
goto rdb_done;
}
pb = (struct PartitionBlock *)data;
......
......@@ -88,7 +88,7 @@ int atari_partition(struct parsed_partitions *state, struct block_device *bdev)
if (!xrs) {
printk (" block %ld read failed\n", partsect);
put_dev_sector(sect);
return 0;
return -1;
}
/* ++roman: sanity check: bit 0 of flg field must be set */
......
......@@ -153,7 +153,7 @@ static struct parsed_partitions *
check_partition(struct gendisk *hd, struct block_device *bdev)
{
struct parsed_partitions *state;
int i, res;
int i, res, err;
state = kmalloc(sizeof(struct parsed_partitions), GFP_KERNEL);
if (!state)
......@@ -165,13 +165,24 @@ check_partition(struct gendisk *hd, struct block_device *bdev)
sprintf(state->name, "p");
state->limit = hd->minors;
i = res = 0;
i = res = err = 0;
while (!res && check_part[i]) {
memset(&state->parts, 0, sizeof(state->parts));
res = check_part[i++](state, bdev);
if (res < 0) {
/* We have hit an I/O error which we don't report now.
* But record it, and let the others do their job.
*/
err = res;
res = 0;
}
}
if (res > 0)
return state;
if (!err)
/* The partition is unrecognized. So report I/O errors if there were any */
res = err;
if (!res)
printk(" unknown partition table\n");
else if (warn_no_part)
......
......@@ -43,7 +43,7 @@ cchhb2blk (struct vtoc_cchhb *ptr, struct hd_geometry *geo) {
int
ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
{
int blocksize, offset, size;
int blocksize, offset, size,res;
loff_t i_size;
dasd_information_t *info;
struct hd_geometry *geo;
......@@ -56,15 +56,16 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
unsigned char *data;
Sector sect;
res = 0;
blocksize = bdev_hardsect_size(bdev);
if (blocksize <= 0)
return 0;
goto out_exit;
i_size = i_size_read(bdev->bd_inode);
if (i_size == 0)
return 0;
goto out_exit;
if ((info = kmalloc(sizeof(dasd_information_t), GFP_KERNEL)) == NULL)
goto out_noinfo;
goto out_exit;
if ((geo = kmalloc(sizeof(struct hd_geometry), GFP_KERNEL)) == NULL)
goto out_nogeo;
if ((label = kmalloc(sizeof(union label_t), GFP_KERNEL)) == NULL)
......@@ -72,7 +73,7 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
if (ioctl_by_bdev(bdev, BIODASDINFO, (unsigned long)info) != 0 ||
ioctl_by_bdev(bdev, HDIO_GETGEO, (unsigned long)geo) != 0)
goto out_noioctl;
goto out_freeall;
/*
* Get volume label, extract name and type.
......@@ -92,6 +93,8 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
EBCASC(type, 4);
EBCASC(name, 6);
res = 1;
/*
* Three different types: CMS1, VOL1 and LNX1/unlabeled
*/
......@@ -156,6 +159,9 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
counter++;
blk++;
}
if (!data)
/* Are we not supposed to report this ? */
goto out_readerr;
} else {
/*
* Old style LNX1 or unlabeled disk
......@@ -171,18 +177,17 @@ ibm_partition(struct parsed_partitions *state, struct block_device *bdev)
}
printk("\n");
kfree(label);
kfree(geo);
kfree(info);
return 1;
goto out_freeall;
out_readerr:
out_noioctl:
res = -1;
out_freeall:
kfree(label);
out_nolab:
kfree(geo);
out_nogeo:
kfree(info);
out_noinfo:
return 0;
out_exit:
return res;
}
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