Author: mav
Date: Sat Mar 31 11:23:09 2012
New Revision: 233746
URL: http://svn.freebsd.org/changeset/base/233746
Log:
Be more conservative in using READ CAPACITY(16) command. Previous code
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
Modified:
head/sys/cam/scsi/scsi_da.c
Modified: head/sys/cam/scsi/scsi_da.c
==============================================================================
--- head/sys/cam/scsi/scsi_da.c Sat Mar 31 11:20:48 2012 (r233745)
+++ head/sys/cam/scsi/scsi_da.c Sat Mar 31 11:23:09 2012 (r233746)
@@ -1631,9 +1631,7 @@ daregister(struct cam_periph *periph, vo
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;
}
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