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Revert "atmel-samd: Tweak mass storage code to finish read sooner." 

This reverts commit 182a946b0e.
This commit is contained in:
Dan Halbert 2017-11-08 11:17:10 -05:00
parent b4fc464a4d
commit bfe7e055e9
1 changed files with 4 additions and 3 deletions
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7
ports/atmel-samd/usb_mass_storage.c
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@ -259,9 +259,6 @@ int32_t usb_msc_xfer_done(uint8_t lun) {
if (active_read) {
active_addr += 1;
active_nblocks--;
if (active_nblocks == 0) {
active_read = false;
}
}
if (active_write) {
@ -275,6 +272,10 @@ int32_t usb_msc_xfer_done(uint8_t lun) {
// The start_read callback begins a read transaction which we accept but delay our response until the "main thread" calls usb_msc_background. Once it does, we read immediately from the drive into our cache and trigger the USB DMA to output the sector. Once the sector is transmitted, xfer_done will be called.
void usb_msc_background(void) {
if (active_read && !usb_busy) {
if (active_nblocks == 0) {
active_read = false;
return;
}
fs_user_mount_t * vfs = get_vfs(active_lun);
disk_read(vfs, sector_buffer, active_addr, 1);
// TODO(tannewt): Check the read result.