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scsi: add support for unit attention conditions

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Unit attention conditions override any sense data the device already
has.  Their signaling and clearing is handled entirely by the SCSIBus
code, and they are completely transparent to the SCSIDevices.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2011-08-03 10:49:17 +02:00 • committed by Anthony Liguori
parent a872a3049a
commit 6dc06f08b3
3 changed files with 94 additions and 2 deletions
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2
hw/scsi.h
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@ -62,6 +62,7 @@ struct SCSIDevice
uint32_t id;
BlockConf conf;
SCSIDeviceInfo *info;
SCSISense unit_attention;
uint8_t sense[SCSI_SENSE_BUF_SIZE];
uint32_t sense_len;
QTAILQ_HEAD(, SCSIRequest) requests;
@ -105,6 +106,7 @@ struct SCSIBus {
BusState qbus;
int busnr;
SCSISense unit_attention;
int tcq, ndev;
const SCSIBusOps *ops;