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ANDROID: usb: f_fs: Prevent gadget unbind if it is already unbound

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Upon usb composition switch there is possibility of ep0 file
release happening after gadget driver bind. In case of composition
switch from adb to a non-adb composition gadget will never gets
bound again resulting into failure of usb device enumeration. Fix
this issue by checking FFS_FL_BOUND flag and avoid extra
gadget driver unbind if it is already done as part of composition
switch.

Change-Id: I1638001ff4a94f08224b188aa42425f3d732fa2b
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar
2016-08-08 16:20:15 -07:00
committed by Dmitry Shmidt
parent 5f5e5d4041
commit b54d99aa12
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/gadget/function/f_fs.c
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@@ -3725,7 +3725,8 @@ static void ffs_closed(struct ffs_data *ffs)
ci = opts->func_inst.group.cg_item.ci_parent->ci_parent;
ffs_dev_unlock();
unregister_gadget_item(ci);
if (test_bit(FFS_FL_BOUND, &ffs->flags))
unregister_gadget_item(ci);
return;
done:
ffs_dev_unlock();