[PATCH 05/12] lpfc: Fix dmabuf ptr assignment in lpfc_ct_reject_event

James Smart
2022-05-06T03:55:45Z

Upon driver receipt of a CT cmd for type = 0xFA (Management Server) and
subtype = 0x11 (Fabric Device Management Interface), the driver is
responding with garbage CT cmd data when it should send a properly
formed RJT.

The __lpfc_prep_xmit_seq64_s4() routine was using the wrong buffer
for the reject.

Fix by converting the routine to use the buffer specified in the bde
within the wqe rather than the ill-set bmp element.

Fixes: 61910d6a5243 ("scsi: lpfc: SLI path split: Refactor CT paths")
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
---
drivers/scsi/lpfc/lpfc_sli.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index b509b3147759..573526f08baf 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -10808,24 +10808,15 @@ __lpfc_sli_prep_xmit_seq64_s4(struct lpfc_iocbq *cmdiocbq,
{
union lpfc_wqe128 *wqe;
struct ulp_bde64 *bpl;
- struct ulp_bde64_le *bde;

wqe = &cmdiocbq->wqe;
memset(wqe, 0, sizeof(*wqe));

/* Words 0 - 2 */
bpl = (struct ulp_bde64 *)bmp->virt;
- if (cmdiocbq->cmd_flag & (LPFC_IO_LIBDFC | LPFC_IO_LOOPBACK)) {
- wqe->xmit_sequence.bde.addrHigh = bpl->addrHigh;
- wqe->xmit_sequence.bde.addrLow = bpl->addrLow;
- wqe->xmit_sequence.bde.tus.w = bpl->tus.w;
- } else {
- bde = (struct ulp_bde64_le *)&wqe->xmit_sequence.bde;
- bde->addr_low = cpu_to_le32(putPaddrLow(bmp->phys));
- bde->addr_high = cpu_to_le32(putPaddrHigh(bmp->phys));
- bde->type_size = cpu_to_le32(bpl->tus.f.bdeSize);
- bde->type_size |= cpu_to_le32(ULP_BDE64_TYPE_BDE_64);
- }
+ wqe->xmit_sequence.bde.addrHigh = bpl->addrHigh;
+ wqe->xmit_sequence.bde.addrLow = bpl->addrLow;
+ wqe->xmit_sequence.bde.tus.w = bpl->tus.w;

/* Word 5 */
bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, last_seq);
--
2.26.2