diff options
| -rw-r--r-- | firmware/target/arm/imx233/sdmmc-imx233.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/firmware/target/arm/imx233/sdmmc-imx233.c b/firmware/target/arm/imx233/sdmmc-imx233.c index e42842d..f552246 100644 --- a/firmware/target/arm/imx233/sdmmc-imx233.c +++ b/firmware/target/arm/imx233/sdmmc-imx233.c @@ -648,14 +648,15 @@ static int transfer_sectors(int drive, unsigned long start, int count, void *buf * Read transfers: * If the buffer is already aligned, transfer everything at once. * Otherwise, transfer all sectors but one to the sub-buffer starting - * on the next cache ligned and then move the data. Then transfer the + * on the next cache line and then move the data. Then transfer the * last sector to the aligned_buffer and then copy to the buffer. * * Write transfers: * If the buffer is already aligned, transfer everything at once. * Otherwise, copy the first sector to the aligned_buffer and transfer. * Then move all other sectors within the buffer to make it cache - * aligned and transfer it. + * aligned and transfer it. Then move data to pretend the buffer was + * never modified. */ if(read) { @@ -689,6 +690,9 @@ static int transfer_sectors(int drive, unsigned long start, int count, void *buf // move within the buffer and transfer memmove(ptr, buf + 512, 512 * (count - 1)); ret = __xfer_sectors(drive, start + 1, count - 1, ptr, read); + // move back + memmove(buf + 512, ptr, 512 * (count - 1)); + memcpy(buf, aligned_buffer[drive], 512); } } else |