[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: Suzuki K P <suzuki@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/partitions/amiga.c b/fs/partitions/amiga.c
index 3068528890a6255191d813195fb636363584f2e5..9917a8c360f2da0537baea01559b468825476521 100644 (file)
--- a/fs/partitions/amiga.c
+++ b/fs/partitions/amiga.c
@@ -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;

diff --git a/fs/partitions/atari.c b/fs/partitions/atari.c
index 192a6adfdefddb504616436969d24732203ff1f8..1f3572d5b755127ed2043a7329815687dff06f8e 100644 (file)
--- a/fs/partitions/atari.c
+++ b/fs/partitions/atari.c
@@ -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 */

diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 0b6113ba3b7904760c9c2c909372e055a8ab95ba..1901137f4eca3d66e46e30bec858f7c35ff154f8 100644 (file)
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -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)

diff --git a/fs/partitions/ibm.c b/fs/partitions/ibm.c
index d352a7381fed88ff20f5f1c7b9b6365a2264e436..9f7ad4244f63d64ed723939c568fc88de53ae7c3 100644 (file)
--- a/fs/partitions/ibm.c
+++ b/fs/partitions/ibm.c
@@ -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;
 }