Skip to content

shared/usb: correctly report the SD LUN as removable media #10967

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
mikeysklar wants to merge 2 commits into
base: main
Choose a base branch
from
+7 −2
Open

shared/usb: correctly report the SD LUN as removable media #10967

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
060019f
shared/usb: per-LUN response to PREVENT_ALLOW_MEDIUM_REMOVAL
mikeysklar Apr 22, 2026
a2b9e97
shared/usb: reply unsupported to PREVENT_ALLOW on all LUNs
mikeysklar Apr 23, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 7 additions & 2 deletions supervisor/shared/usb/usb_msc_flash.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -214,8 +214,13 @@ int32_t tud_msc_scsi_cb(uint8_t lun, const uint8_t scsi_cmd[16], void *buffer, u

switch (scsi_cmd[0]) {
case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
// Host is about to read/write etc ... better not to disconnect disk
resplen = 0;
// All LUNs advertise is_removable=1 in INQUIRY (tinyusb default).
// Reply "unsupported" so the host keeps polling TUR and can
// re-mount after an eject. Responding OK tells the host to skip
// TUR polling, which breaks re-mount and can miss SD insertion
// events at boot. See adafruit/circuitpython#6555.
tud_msc_set_sense(lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00);
resplen = -1;
break;

default:
Expand Down
Loading