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[V3,8/9] pm80xx : panic on ncq error cleaning up the read log.

Message ID 20170919171004.10331-9-Viswas.G@microsemi.com (mailing list archive)
State Changes Requested
Headers show

Commit Message

Viswas G Sept. 19, 2017, 5:10 p.m. UTC 
when there's an error in 'ncq mode' the host has to read the ncq
error log (10h) to clear the error state. however, the ccb that
is setup for doing this doesn't setup the ccb so that the
previous state is cleared. if the ccb was previously used for an IO
n_elems is set and pm8001_ccb_task_free() treats this as the signal
to go free a scatter-gather list (that's already been free-ed).

Signed-off-by: Deepak Ukey <deepak.ukey@microsemi.com>
Signed-off-by: Viswas G <Viswas.G@microsemi.com>

Acked-by: Jack Wang <jinpu.wang@profitbricks.com>
---
 drivers/scsi/pm8001/pm80xx_hwi.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index 92d2045dea68..f2c0839afbe3 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -1489,6 +1489,7 @@  static void pm80xx_send_read_log(struct pm8001_hba_info *pm8001_ha,
 	ccb->device = pm8001_ha_dev;
 	ccb->ccb_tag = ccb_tag;
 	ccb->task = task;
+	ccb->n_elem = 0;
 	pm8001_ha_dev->id |= NCQ_READ_LOG_FLAG;
 	pm8001_ha_dev->id |= NCQ_2ND_RLE_FLAG;