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Be more conservative in using READ CAPACITY(16) command. Previous code

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checked PROTECT bit in INQUIRY data for all SPC devices, while it is defined
only since SPC-3. But there are some SPC-2 USB devices were reported, that
have PROTECT bit set, return no error for READ CAPACITY(16) command, but
return wrong sector count value in response.

MFC after:	3 days
This commit is contained in:
mav 2012-03-31 11:23:09 +00:00
parent 03c053c63d
commit 4409a9b5ec
1 changed files with 1 additions and 3 deletions
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4
sys/cam/scsi/scsi_da.c
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@ -1631,9 +1631,7 @@ daregister(struct cam_periph *periph, void *arg)
softc->minimum_cmd_size = 16;
/* Predict whether device may support READ CAPACITY(16). */
if (SID_ANSI_REV(&cgd->inq_data) >= SCSI_REV_SPC3 ||
(SID_ANSI_REV(&cgd->inq_data) >= SCSI_REV_SPC &&
(cgd->inq_data.spc3_flags & SPC3_SID_PROTECT))) {
if (SID_ANSI_REV(&cgd->inq_data) >= SCSI_REV_SPC3) {
softc->flags |= DA_FLAG_CAN_RC16;
softc->state = DA_STATE_PROBE2;
}