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ATA device reset starts probe sequence from the beginning. If reset caused

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by timeout/error of one of probe commands, process may continue infinitely.
Make CAM ATA more robust to faulty devices and false positive detections,
abort probe after two restarts on timeouts or ten on other errors.
This commit is contained in:
Alexander Motin 2010-07-06 19:05:41 +00:00
parent d12fc952b7
commit 25a519a918
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=209744
1 changed files with 19 additions and 4 deletions
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23
sys/cam/ata/ata_xpt.c
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@ -134,6 +134,7 @@ typedef struct {
uint32_t pm_prv;
int restart;
int spinup;
int faults;
u_int caps;
struct cam_periph *periph;
} probe_softc;
@ -738,14 +739,28 @@ probedone(struct cam_periph *periph, union ccb *done_ccb)
ident_buf = &path->device->ident_data;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
device_fail: if ((!softc->restart) &&
cam_periph_error(done_ccb, 0, 0, NULL) == ERESTART) {
if (softc->restart) {
if (bootverbose) {
cam_error_print(done_ccb,
CAM_ESF_ALL, CAM_EPF_ALL);
}
} else if (cam_periph_error(done_ccb, 0, 0, NULL) == ERESTART)
return;
} else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
/* Don't wedge the queue */
xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
/*run_queue*/TRUE);
}
if (softc->restart) {
softc->faults++;
if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) ==
CAM_CMD_TIMEOUT)
softc->faults += 4;
if (softc->faults < 10)
goto done;
else
softc->restart = 0;
} else
/* Old PIO2 devices may not support mode setting. */
if (softc->action == PROBE_SETMODE &&
ata_max_pmode(ident_buf) <= ATA_PIO2 &&
@ -761,7 +776,7 @@ device_fail: if ((!softc->restart) &&
* already marked unconfigured, notify the peripheral
* drivers that this device is no more.
*/
if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
device_fail: if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
xpt_async(AC_LOST_DEVICE, path, NULL);
found = 0;
goto done;