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FAT: check for partition 0 not 1 for whole-disk fs

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The recent switch to use get_device_and_partition() from do_fat_ls()
broke the ability to access a FAT filesystem directly on a whole device;
FAT only works within a partition on a device.

This change makes e.g. "fatls mmc 0:0" work; explicitly requesting
partition ID 0 is something that get_device_and_partition() fully
supports. However, fat_register_device() expects partition ID 1 to be
used in the full-disk case; partition ID 1 was previously implicitly
specified when the user didn't actually specify a partition ID. Update
fat_register_device() to expect the correct ID.

This change does imply that if a user explicitly executes "fatls mmc 0:1"
then this will fail, and may be a change in behaviour.

Note that this still prevents "fatls mmc 0:auto" from working. The next
patch will fix that.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2012-10-05 13:17:39 +00:00 • committed by Tom Rini
parent 03eecab9a1
commit bd1a7e3034
1 changed files with 1 additions and 1 deletions
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2
fs/fat/fat.c
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@ -85,7 +85,7 @@ int fat_register_device(block_dev_desc_t * dev_desc, int part_no)
/* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */
if (!cur_dev) {
if (part_no != 1) {
if (part_no != 0) {
printf("** Partition %d not valid on device %d **\n",
part_no, dev_desc->dev);
return -1;