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fix(fatfs): Fixed uninitialized FATFS pointer for already mounted path

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Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Martin Vychodil
2026-04-07 12:08:49 +02:00
parent 70531b1a59
commit 9702ed5257
3 changed files with 11 additions and 4 deletions
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4
components/fatfs/vfs/esp_vfs_fat.h
View File

@@ -63,7 +63,9 @@ typedef struct {
* @param[out] out_fs pointer to FATFS structure which can be used for FATFS f_mount call is returned via this argument.
* @return
* - ESP_OK on success
* - ESP_ERR_INVALID_STATE if esp_vfs_fat_register was already called
* - ESP_ERR_INVALID_STATE if a filesystem is already registered at this base path.
* If @p out_fs is not NULL, @p *out_fs is set to the existing FATFS object so callers
* can run f_mount (e.g. remount the same path).
* - ESP_ERR_NO_MEM if not enough memory or too many VFSes already registered
*/
esp_err_t esp_vfs_fat_register(const esp_vfs_fat_conf_t* conf, FATFS** out_fs);

7
components/fatfs/vfs/vfs_fat.c
View File

@@ -179,6 +179,9 @@ esp_err_t esp_vfs_fat_register(const esp_vfs_fat_conf_t* conf, FATFS** out_fs)
{
size_t ctx = find_context_index_by_path(conf->base_path);
if (ctx < FF_VOLUMES) {
if (out_fs) {
*out_fs = &s_fat_ctxs[ctx]->fs;
}
return ESP_ERR_INVALID_STATE;
}
@@ -221,7 +224,9 @@ esp_err_t esp_vfs_fat_register(const esp_vfs_fat_conf_t* conf, FATFS** out_fs)
//compatibility
s_fat_ctx = fat_ctx;
*out_fs = &fat_ctx->fs;
if (out_fs) {
*out_fs = &fat_ctx->fs;
}
return ESP_OK;
}

4
components/fatfs/vfs/vfs_fat_spiflash.c
View File

@@ -171,7 +171,7 @@ esp_err_t esp_vfs_fat_spiflash_mount_rw_wl(const char* base_path,
char drv[3] = {(char)('0' + pdrv), ':', 0};
ESP_GOTO_ON_ERROR(ff_diskio_register_wl_partition(pdrv, *wl_handle), fail, TAG, "ff_diskio_register_wl_partition failed pdrv=%i, error - 0x(%x)", pdrv, ret);
FATFS *fs;
FATFS *fs = NULL;
esp_vfs_fat_conf_t conf = {
.base_path = base_path,
.fat_drive = drv,
@@ -366,7 +366,7 @@ esp_err_t esp_vfs_fat_spiflash_mount_ro(const char* base_path,
char drv[3] = {(char)('0' + pdrv), ':', 0};
ESP_GOTO_ON_ERROR(ff_diskio_register_raw_partition(pdrv, data_partition), fail, TAG, "ff_diskio_register_raw_partition failed pdrv=%i, error - 0x(%x)", pdrv, ret);
FATFS *fs;
FATFS *fs = NULL;
esp_vfs_fat_conf_t conf = {
.base_path = base_path,
.fat_drive = drv,