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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
parent 9b68fb8b48
commit 35fdb9cd7e
1 changed files with 4 additions and 3 deletions
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3
drivers/usb/gadget/function/f_fs.c
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@ -3968,10 +3968,11 @@ static void ffs_closed(struct ffs_data *ffs)
ffs_dev_unlock(); ffs_dev_unlock();
if (test_bit(FFS_FL_BOUND, &ffs->flags)) {
unregister_gadget_item(opts-> unregister_gadget_item(opts->
func_inst.group.cg_item.ci_parent->ci_parent); func_inst.group.cg_item.ci_parent->ci_parent);
ffs_log("unreg gadget done"); ffs_log("unreg gadget done");
}
done: done:
ffs_log("exit"); ffs_log("exit");
} }