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anolis: sw64: megaraid: fix kernel panic caused by accessing an illegal address 

ANBZ: #4688

On SUBARCH_C3B, when using the original driver for LSI MegaRAID
SAS-3 PCIe card, a kernel panic may arise from accessing an illegal
address. Make some changes for SUBARCH_C3B to avoid it. But it may
not be avoided entirely.

Signed-off-by: Gu Zitao <guzitao@wxiat.com>
Reviewed-by: He Sheng <hesheng@wxiat.com>
Signed-off-by: Gu Zitao <guzitao@wxiat.com>
Reviewed-by: Gu Mi <gumi@linux.alibaba.com>
Reviewed-by: Guixin Liu <kanie@linux.alibaba.com>
Link: https://gitee.com/anolis/cloud-kernel/pulls/1659
This commit is contained in:
Gu Zitao 2022-01-29 09:13:09 +08:00 committed by 小龙
parent 731d67be41
commit 513839732d
1 changed files with 8 additions and 0 deletions
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8
drivers/scsi/megaraid/megaraid_sas_fusion.c
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@ -3503,6 +3503,14 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
d_val.u.high != cpu_to_le32(UINT_MAX)) {
smid = le16_to_cpu(reply_desc->SMID);
#ifdef CONFIG_SUBARCH_C3B
if (smid == 0xffff) {
smid = d_val.u.low >> 16;
if (smid == 0xffff)
break;
}
#endif
cmd_fusion = fusion->cmd_list[smid - 1];
scsi_io_req = (struct MPI2_RAID_SCSI_IO_REQUEST *)
cmd_fusion->io_request;