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    configfs: Allow ->make_item() and ->make_group() to return detailed errors. · a6795e9e
    Joel Becker 提交于
    The configfs operations ->make_item() and ->make_group() currently
    return a new item/group.  A return of NULL signifies an error.  Because
    of this, -ENOMEM is the only return code bubbled up the stack.
    
    Multiple folks have requested the ability to return specific error codes
    when these operations fail.  This patch adds that ability by changing the
    ->make_item/group() ops to return ERR_PTR() values.  These errors are
    bubbled up appropriately.  NULL returns are changed to -ENOMEM for
    compatibility.
    
    Also updated are the in-kernel users of configfs.
    
    This is a rework of reverted commit 11c3b792.
    Signed-off-by: NJoel Becker <joel.becker@oracle.com>
    a6795e9e
dir.c 37.8 KB