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Code Issues Wiki Activity

[Horus] Massstorage bugfix (read cache beyond end of disk)

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This commit is contained in:
Bertrand Songis 2016-07-30 23:30:41 +02:00
parent 9d492b4faf
commit fcdcccf8f5
3 changed files with 17 additions and 11 deletions
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8
radio/src/disk_cache.cpp
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@ -55,7 +55,6 @@ bool DiskCacheBlock::read(BYTE* buff, DWORD sector, UINT count)
DRESULT DiskCacheBlock::fill(BYTE drv, BYTE * buff, DWORD sector, UINT count)
{
// TODO: check if trying to read beyond the end of disk
DRESULT res = __disk_read(drv, data, sector, DISK_CACHE_BLOCK_SECTORS);
if (res != RES_OK) {
return res;
@ -102,6 +101,12 @@ DRESULT DiskCache::read(BYTE drv, BYTE* buff, DWORD sector, UINT count)
return __disk_read(drv, buff, sector, count);
}
// if block + cache block size is beyond the end of the disk, then read it directly without using cache
if (sector+DISK_CACHE_BLOCK_SECTORS > SDCardInfo.CardCapacity / SDCardInfo.CardBlockSize) {
TRACE_DISK_CACHE("\t\t cache would be beyond end of disk(%u)", this, (uint32_t)sector);
return __disk_read(drv, buff, sector, count);
}
for (int n=0; n<DISK_CACHE_BLOCKS_NUM; ++n) {
if (blocks[n].read(buff, sector, count)) {
++stats.noHits;
@ -124,6 +129,7 @@ DRESULT DiskCache::read(BYTE drv, BYTE* buff, DWORD sector, UINT count)
if (++lastBlock >= DISK_CACHE_BLOCKS_NUM) {
lastBlock = 0;
}
return blocks[lastBlock].fill(drv, buff, sector, count);
}

2
radio/src/targets/common/arm/stm32/usbd_storage_msd.cpp
View file

@ -21,6 +21,7 @@
/* Includes ------------------------------------------------------------------*/
#include "opentx.h"
#include "FatFs/diskio.h"
#include "sdio_sd.h"
#if defined(__cplusplus) && !defined(SIMU)
extern "C" {
@ -39,7 +40,6 @@ enum MassstorageLuns {
/* USB Mass storage Standard Inquiry Data */
const unsigned char STORAGE_Inquirydata[] = { //36
/* LUN 0 */
0x00,
0x80,