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| author | Shyam Sundar <ssundar@marvell.com> | 2019-12-17 14:06:06 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-12-19 22:42:44 -0500 |
| commit | 27258a5771446f9c7edc929ecb76fe2c12c29d97 (patch) | |
| tree | 53c035170f5f99199ad1526fa0296d4c4d400f29 /drivers/scsi/qla2xxx/qla_inline.h | |
| parent | f57a0107359605b29f4ea9afb8ee2e03473b1448 (diff) | |
| download | linux-27258a5771446f9c7edc929ecb76fe2c12c29d97.tar.gz linux-27258a5771446f9c7edc929ecb76fe2c12c29d97.tar.bz2 linux-27258a5771446f9c7edc929ecb76fe2c12c29d97.zip | |
scsi: qla2xxx: Add a shadow variable to hold disc_state history of fcport
This patch adds a shadow variable to hold disc_state history for the fcport
and prints state transition when the logging is enabled.
Link: https://lore.kernel.org/r/20191217220617.28084-4-hmadhani@marvell.com
Signed-off-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_inline.h')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_inline.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h index 352aba4127f7..364b3db8b2dc 100644 --- a/drivers/scsi/qla2xxx/qla_inline.h +++ b/drivers/scsi/qla2xxx/qla_inline.h @@ -105,6 +105,30 @@ qla2x00_clean_dsd_pool(struct qla_hw_data *ha, struct crc_context *ctx) INIT_LIST_HEAD(&ctx->dsd_list); } +static inline void +qla2x00_set_fcport_disc_state(fc_port_t *fcport, int state) +{ + int old_val; + uint8_t shiftbits, mask; + + /* This will have to change when the max no. of states > 16 */ + shiftbits = 4; + mask = (1 << shiftbits) - 1; + + fcport->disc_state = state; + while (1) { + old_val = atomic_read(&fcport->shadow_disc_state); + if (old_val == atomic_cmpxchg(&fcport->shadow_disc_state, + old_val, (old_val << shiftbits) | state)) { + ql_dbg(ql_dbg_disc, fcport->vha, 0x2134, + "FCPort %8phC disc_state transition: %s to %s - portid=%06x.\n", + fcport->port_name, port_dstate_str[old_val & mask], + port_dstate_str[state], fcport->d_id.b24); + return; + } + } +} + static inline int qla2x00_hba_err_chk_enabled(srb_t *sp) { |