Don't fail for "revert to poweron defaults" IDE command, by Carlo
Marcelo Arenas Belon. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2485 c046a42c-6fe2-441c-8c8c-71466251a162
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			@ -1729,6 +1729,8 @@ static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
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                goto abort_cmd;
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            /* XXX: valid for CDROM ? */
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            switch(s->feature) {
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            case 0xcc: /* reverting to power-on defaults enable */
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            case 0x66: /* reverting to power-on defaults disable */
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            case 0x02: /* write cache enable */
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            case 0x82: /* write cache disable */
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            case 0xaa: /* read look-ahead enable */
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