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scsi: mpt3sas: Don't access the structure after decrementing it's instance reference count. 

While configuring of NVMe device handling, _pcie_device structure member
was accessed after its reference count is decremented/put. Hence modified
code to access member of _pcie_device structure before its reference count
is decremented/put.

Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Chaitra P B 2018-05-31 06:34:49 -04:00 committed by Martin K. Petersen
parent e3586147b8
commit 20a044332d
1 changed files with 4 additions and 3 deletions
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7
drivers/scsi/mpt3sas/mpt3sas_scsih.c
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@ -2365,13 +2365,14 @@ scsih_slave_configure(struct scsi_device *sdev)
"connector name( %s)\n", ds,
pcie_device->enclosure_level,
pcie_device->connector_name);
pcie_device_put(pcie_device);
spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
scsih_change_queue_depth(sdev, qdepth);
if (pcie_device->nvme_mdts)
blk_queue_max_hw_sectors(sdev->request_queue,
pcie_device->nvme_mdts/512);
pcie_device_put(pcie_device);
spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
scsih_change_queue_depth(sdev, qdepth);
/* Enable QUEUE_FLAG_NOMERGES flag, so that IOs won't be
** merged and can eliminate holes created during merging
** operation.