diff options
| author | Aaro Koskinen <Aaro.Koskinen@nokia.com> | 2009-04-14 15:47:00 -0500 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-05-20 17:21:14 -0500 |
| commit | fa8584566cc9cdaf067dbc12132792887a521da9 (patch) | |
| tree | e103d0c9b1885ad8c017ea5f20b7881f06e85239 /drivers/scsi/sym53c8xx_2/sym_hipd.h | |
| parent | 410604d25faddb1b4f0f9667b7452c06cc06cea1 (diff) | |
[SCSI] sym53c8xx_2: slave_alloc/destroy safety (2.6.27.5)
Make the sym53c8xx_2 driver slave_alloc/destroy less unsafe. References
to the destroyed LCB are cleared from the target structure (instead of
leaving a dangling pointer), and when the last LCB for the target is
destroyed the reference to the upper layer target data is cleared. The
host lock is used to prevent a race with the interrupt handler. Also
user commands are prevented for targets with all LCBs destroyed.
Signed-off-by: Aaro Koskinen <Aaro.Koskinen@nokia.com>
Tested-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_hipd.h')
| -rw-r--r-- | drivers/scsi/sym53c8xx_2/sym_hipd.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.h b/drivers/scsi/sym53c8xx_2/sym_hipd.h index 9ebc8706b6b..053e63c8682 100644 --- a/drivers/scsi/sym53c8xx_2/sym_hipd.h +++ b/drivers/scsi/sym53c8xx_2/sym_hipd.h @@ -401,6 +401,7 @@ struct sym_tcb { * An array of bus addresses is used on reselection. */ u32 *luntbl; /* LCBs bus address table */ + int nlcb; /* Number of valid LCBs (including LUN #0) */ /* * LUN table used by the C code. @@ -1065,6 +1066,7 @@ int sym_clear_tasks(struct sym_hcb *np, int cam_status, int target, int lun, int struct sym_ccb *sym_get_ccb(struct sym_hcb *np, struct scsi_cmnd *cmd, u_char tag_order); void sym_free_ccb(struct sym_hcb *np, struct sym_ccb *cp); struct sym_lcb *sym_alloc_lcb(struct sym_hcb *np, u_char tn, u_char ln); +int sym_free_lcb(struct sym_hcb *np, u_char tn, u_char ln); int sym_queue_scsiio(struct sym_hcb *np, struct scsi_cmnd *csio, struct sym_ccb *cp); int sym_abort_scsiio(struct sym_hcb *np, struct scsi_cmnd *ccb, int timed_out); int sym_reset_scsi_target(struct sym_hcb *np, int target); |