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| author | Don Brace <don.brace@microsemi.com> | 2016-09-09 16:30:23 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-09-14 14:14:40 -0400 |
| commit | d49c2077c03d70a59e3063c7d33f00172491ae31 (patch) | |
| tree | 841167e2f2a4c87f44bb496bf0564d3de139dcb2 /drivers/scsi | |
| parent | 86cf7130a58bd2cdd09da72cdadae0dcd5f5db19 (diff) | |
| download | linux-d49c2077c03d70a59e3063c7d33f00172491ae31.tar.gz linux-d49c2077c03d70a59e3063c7d33f00172491ae31.tar.bz2 linux-d49c2077c03d70a59e3063c7d33f00172491ae31.zip | |
scsi: hpsa: Check for null device pointers
A device can be deleted causing NULL pointer issues.
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/hpsa.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 332ff1ab7491..97f50c71b7c9 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -2388,7 +2388,8 @@ static void hpsa_cmd_free_and_done(struct ctlr_info *h, struct CommandList *c, struct scsi_cmnd *cmd) { hpsa_cmd_resolve_and_free(h, c); - cmd->scsi_done(cmd); + if (cmd && cmd->scsi_done) + cmd->scsi_done(cmd); } static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c) @@ -2489,6 +2490,12 @@ static void complete_scsi_command(struct CommandList *cp) ei = cp->err_info; cmd = cp->scsi_cmd; h = cp->h; + + if (!cmd->device) { + cmd->result = DID_NO_CONNECT << 16; + return hpsa_cmd_free_and_done(h, cp, cmd); + } + dev = cmd->device->hostdata; c2 = &h->ioaccel2_cmd_pool[cp->cmdindex]; @@ -2504,8 +2511,15 @@ static void complete_scsi_command(struct CommandList *cp) cmd->result = (DID_OK << 16); /* host byte */ cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ - if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) - atomic_dec(&cp->phys_disk->ioaccel_cmds_out); + if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) { + if (dev->physical_device && dev->expose_device && + dev->removed) { + cmd->result = DID_NO_CONNECT << 16; + return hpsa_cmd_free_and_done(h, cp, cmd); + } + if (likely(cp->phys_disk != NULL)) + atomic_dec(&cp->phys_disk->ioaccel_cmds_out); + } /* * We check for lockup status here as it may be set for |