devkbd: fix wrong refcount on open error
only decrement refcount when file was successfully opend on clunk, fix refcount when devopen() errors.
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@ -339,10 +339,15 @@ kbdopen(Chan *c, int omode)
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if(!iseve())
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error(Eperm);
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if(c->qid.path == Qscancode){
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if(incref(&kbd.ref) != 1){
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if(waserror()){
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decref(&kbd.ref);
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error(Einuse);
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nexterror();
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}
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if(incref(&kbd.ref) != 1)
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error(Einuse);
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c = devopen(c, omode, kbdtab, nelem(kbdtab), devgen);
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poperror();
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return c;
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}
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return devopen(c, omode, kbdtab, nelem(kbdtab), devgen);
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}
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@ -350,7 +355,7 @@ kbdopen(Chan *c, int omode)
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static void
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kbdclose(Chan *c)
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{
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if(c->qid.path == Qscancode)
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if((c->flag & COPEN) && c->qid.path == Qscancode)
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decref(&kbd.ref);
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}
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