OrgApache/incubator-nuttx
OrgApache
/
incubator-nuttx
mirror of https://github.com/apache/incubator-nuttx.git
1
0
Fork 0
Code Issues Releases Wiki Activity

fs/fat/fat32util.c: Fix calculation of current sector with invalid cluster 

If the current cluster is invalid, don't use the error code for calculating
the sector number. Instead just return the error code.

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
This commit is contained in:
Jukka Laitinen 2021-05-18 22:39:41 +03:00 committed by Xiang Xiao
parent 65e9ff5a48
commit 105f305b1b
1 changed files with 10 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
fs/fat/fs_fat32util.c
View File

@ -2142,6 +2142,7 @@ int fat_currentsector(struct fat_mountpt_s *fs, struct fat_file_s *ff,
off_t position)
{
int sectoroffset;
off_t cluster_start_sector;
if (position <= ff->ff_size)
{
@ -2149,12 +2150,18 @@ int fat_currentsector(struct fat_mountpt_s *fs, struct fat_file_s *ff,
sectoroffset = SEC_NSECTORS(fs, position) & CLUS_NDXMASK(fs);
/* The current cluster is the first sector of the cluster plus
/* The current sector is the first sector of the cluster plus
* the sector offset
*/
ff->ff_currentsector = fat_cluster2sector(fs, ff->ff_currentcluster)
+ sectoroffset;
cluster_start_sector = fat_cluster2sector(fs, ff->ff_currentcluster);
if (cluster_start_sector < 0)
{
return cluster_start_sector;
}
ff->ff_currentsector = cluster_start_sector + sectoroffset;
/* The remainder is the number of sectors left in the cluster to be
* read/written