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scsi: smartpqi: Correct request leakage during reset operations
[ Upstream commit b622a601a1
]
While failing queued I/Os in TMF path, there was a request leak and hence
stale entries in request pool with ref count being non-zero. In shutdown
path we have a BUG_ON to catch stuck I/O either in firmware or in the
driver. The stale requests caused a system crash. The I/O request pool
leakage also lead to a significant performance drop.
Link: https://lore.kernel.org/r/161549370379.25025.12793264112620796062.stgit@brunhilda
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Murthy Bhat <Murthy.Bhat@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 4 additions and 0 deletions
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@ -5491,6 +5491,8 @@ static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
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list_del(&io_request->request_list_entry);
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list_del(&io_request->request_list_entry);
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set_host_byte(scmd, DID_RESET);
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set_host_byte(scmd, DID_RESET);
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pqi_free_io_request(io_request);
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scsi_dma_unmap(scmd);
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pqi_scsi_done(scmd);
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pqi_scsi_done(scmd);
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}
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}
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@ -5527,6 +5529,8 @@ static void pqi_fail_io_queued_for_all_devices(struct pqi_ctrl_info *ctrl_info)
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list_del(&io_request->request_list_entry);
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list_del(&io_request->request_list_entry);
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set_host_byte(scmd, DID_RESET);
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set_host_byte(scmd, DID_RESET);
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pqi_free_io_request(io_request);
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scsi_dma_unmap(scmd);
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pqi_scsi_done(scmd);
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pqi_scsi_done(scmd);
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}
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}
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