From: matt <wwentao@xxxxxxxxxx>
Date: Tue, 20 Apr 2021 15:27:48 +0800
Subject: [PATCH] Fix 64-bit system enumeration error for Buslogic
Commit 391e2f25601e("BusLogic: Port driver to 64-bit") in Buslogic
driver introduced a serious issue for 64-bit systems. With this
commit, 64-bit kernel will enumerate 8*15 non-existing disks. This
is caused by the broken CCB structure. The change from u32 data to
void *data increased CCB length on 64-bit system, which introduced
an extra 4 byte offset of the CDB. This leads to incorrect response
to Inquiry commands during enumeration.
This patch fixes the error.
Signed-off-by: matt <wwentao@xxxxxxxxxx>
---
drivers/scsi/BusLogic.c | 6 +++---
drivers/scsi/BusLogic.h | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c
index ccb061ab0a0a..7231de2767a9 100644
--- a/drivers/scsi/BusLogic.c
+++ b/drivers/scsi/BusLogic.c
@@ -3078,11 +3078,11 @@ static int blogic_qcmd_lck(struct scsi_cmnd *command,
ccb->opcode = BLOGIC_INITIATOR_CCB_SG;
ccb->datalen = count * sizeof(struct blogic_sg_seg);
if (blogic_multimaster_type(adapter))
- ccb->data = (void *)((unsigned int) ccb->dma_handle +
+ ccb->data = (unsigned int) ccb->dma_handle +
((unsigned long) &ccb->sglist -
- (unsigned long) ccb));
+ (unsigned long) ccb);
else
- ccb->data = ccb->sglist;
+ ccb->data = virt_to_32bit_virt(ccb->sglist);
scsi_for_each_sg(command, sg, count, i) {
ccb->sglist[i].segbytes = sg_dma_len(sg);
diff --git a/drivers/scsi/BusLogic.h b/drivers/scsi/BusLogic.h
index 6182cc8a0344..e081ad47d1cf 100644
--- a/drivers/scsi/BusLogic.h
+++ b/drivers/scsi/BusLogic.h
@@ -814,7 +814,7 @@ struct blogic_ccb {
unsigned char cdblen; /* Byte 2 */
unsigned char sense_datalen; /* Byte 3 */
u32 datalen; /* Bytes 4-7 */
- void *data; /* Bytes 8-11 */
+ u32 data; /* Bytes 8-11 */
unsigned char:8; /* Byte 12 */
unsigned char:8; /* Byte 13 */
enum blogic_adapter_status adapter_status; /* Byte 14 */
--
2.17.1
