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USB: g_mass_storage: Always allow disabling mass storage by writing to lun file

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For android builds we disable the check for curlun->prevent_medium_removal.
Instead we let the framework manage unmounting policy, as we sometimes need
to unmount after the media has been removed.
This also helps support hosts that do not inform the device when the media
has been unmounted.

Signed-off-by: Mike Lockwood <lockwood@android.com>
This commit is contained in:
Mike Lockwood
2010-07-29 14:42:24 -04:00
committed by Colin Cross
parent 88af8fe00c
commit b4ff5d8efe
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/gadget/storage_common.c
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@@ -805,10 +805,16 @@ static ssize_t fsg_store_file(struct device *dev, struct device_attribute *attr,
struct rw_semaphore *filesem = dev_get_drvdata(dev);
int rc = 0;
#ifndef CONFIG_USB_ANDROID_MASS_STORAGE
/* disabled in android because we need to allow closing the backing file
* if the media was removed
*/
if (curlun->prevent_medium_removal && fsg_lun_is_open(curlun)) {
LDBG(curlun, "eject attempt prevented\n");
return -EBUSY; /* "Door is locked" */
}
#endif
/* Remove a trailing newline */
if (count > 0 && buf[count-1] == '\n')