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[elm] Fixed elm device unmount error when mounting multiple elm devices.

This commit is contained in:
liu2guang 2018-01-24 15:13:42 +08:00
parent 6f117e8e36
commit e63de3f66b
1 changed files with 3 additions and 1 deletions
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4
components/dfs/filesystems/elmfat/dfs_elm.c
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@ -182,6 +182,7 @@ int dfs_elm_unmount(struct dfs_filesystem *fs)
FATFS *fat;
FRESULT result;
int index;
char logic_nbr[2] = {'0',':'};
fat = (FATFS *)fs->data;
@ -192,7 +193,8 @@ int dfs_elm_unmount(struct dfs_filesystem *fs)
if (index == -1) /* not found */
return -ENOENT;
result = f_mount(RT_NULL, "", (BYTE)index);
logic_nbr[0] = '0' + index;
result = f_mount(RT_NULL, logic_nbr, (BYTE)1);
if (result != FR_OK)
return elm_result_to_dfs(result);