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Merge pull request #23 from gyurco/master

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Don't read-ahead beyond the file
This commit is contained in:
Till Harbaum
2019-01-08 17:36:24 +01:00
committed by GitHub
parent a8f345fa8c 3611799fe9
commit 9adde6414f
1 changed files with 7 additions and 3 deletions
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10
user_io.c
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@@ -1162,15 +1162,19 @@ void user_io_poll() {
// for the next request already
DISKLED_ON;
if(sd_image[drive_index].file.size) {
IDXSeek(&sd_image[drive_index], lba+1);
IDXRead(&sd_image[drive_index], buffer);
// but check if it would overrun on the file
if(((sd_image[drive_index].file.size-1) >> 9) > lba) {
IDXSeek(&sd_image[drive_index], lba+1);
IDXRead(&sd_image[drive_index], buffer);
buffer_lba = lba + 1;
}
} else {
// sector read
// read sector from sd card if it is not already present in
// the buffer
MMC_Read(lba+1, buffer);
buffer_lba = lba+1;
}
buffer_lba = lba+1;
buffer_drive_index = drive_index;
DISKLED_OFF;
}