[PATCH v2 3/6] qla2xxx: Suppress endianness complaints in qla2x00_configure_local_loop()

Bart Van Assche
2020-01-23T04:23:58Z

Instead of changing endianness in-place, write the data in CPU endian format
in another buffer and copy that buffer back. This patch does not change any
functionality but silences some sparse endianness warnings.

Cc: Quinn Tran <qutran@marvell.com>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Daniel Wagner <dwagner@suse.de>
Cc: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/qla2xxx/qla_def.h | 2 +-
drivers/scsi/qla2xxx/qla_init.c | 11 +++++------
2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index c5a067f45005..b04d334933ef 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -414,7 +414,7 @@ struct els_logo_payload {
struct els_plogi_payload {
uint8_t opcode;
uint8_t rsvd[3];
- uint8_t data[112];
+ __be32 data[112 / 4];
};

struct ct_arg {
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 9e6b56527b25..880f2be062a9 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -5060,7 +5060,7 @@ qla2x00_configure_local_loop(scsi_qla_host_t *vha)
if (N2N_TOPO(ha)) {
if (test_and_clear_bit(N2N_LOGIN_NEEDED, &vha->dpc_flags)) {
/* borrowing */
- u32 *bp, i, sz;
+ u32 *bp, sz;

memset(ha->init_cb, 0, ha->init_cb_size);
sz = min_t(int, sizeof(struct els_plogi_payload),
@@ -5068,13 +5068,12 @@ qla2x00_configure_local_loop(scsi_qla_host_t *vha)
rval = qla24xx_get_port_login_templ(vha,
ha->init_cb_dma, (void *)ha->init_cb, sz);
if (rval == QLA_SUCCESS) {
+ __be32 *q = &ha->plogi_els_payld.data[0];
+
bp = (uint32_t *)ha->init_cb;
- for (i = 0; i < sz/4 ; i++, bp++)
- *bp = cpu_to_be32(*bp);
+ cpu_to_be32_array(q, bp, sz / 4);

- memcpy(&ha->plogi_els_payld.data,
- (void *)ha->init_cb,
- sizeof(ha->plogi_els_payld.data));
+ memcpy(bp, q, sizeof(ha->plogi_els_payld.data));
} else {
ql_dbg(ql_dbg_init, vha, 0x00d1,
"PLOGI ELS param read fail.\n");