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[FIX][DFSv2][ELMFAT]修复多线程环境下lseek返回值概率性被篡改的问题 #11088

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[FIX][DFSv2][ELMFAT]修复多线程环境下lseek返回值概率性被篡改的问题 #11088

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5 changes: 3 additions & 2 deletions components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -629,7 +629,7 @@ int dfs_elm_flush(struct dfs_file *file)
off_t dfs_elm_lseek(struct dfs_file *file, off_t offset, int wherece)
{
FRESULT result = FR_OK;

off_t pos = 0;
switch (wherece)
{
case SEEK_SET:
Expand All @@ -656,11 +656,12 @@ off_t dfs_elm_lseek(struct dfs_file *file, off_t offset, int wherece)
RT_ASSERT(fd != RT_NULL);
rt_mutex_take(&file->vnode->lock, RT_WAITING_FOREVER);
result = f_lseek(fd, offset);
pos = fd->fptr;
rt_mutex_release(&file->vnode->lock);
if (result == FR_OK)
{
/* return current position */
return fd->fptr;
return pos;
}
}
else if (file->vnode->type == FT_DIRECTORY)
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