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[SCSI] megaraid_sas: Fix megasas_ioc_init_fusion

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The following patch for megaraid_sas fixes the megasas_ioc_init_fusion
function to use a local stack variable for the IOCinit frame physical address
instead of clobbering the first request descriptor.

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
adam radford 2014-03-10 02:51:36 -07:00 committed by James Bottomley
parent 26a077e7a6
commit c77a9bd8e0
1 changed files with 7 additions and 10 deletions
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17
drivers/scsi/megaraid/megaraid_sas_fusion.c
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@ -585,7 +585,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
struct megasas_cmd *cmd;
u8 ret;
struct fusion_context *fusion;
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
int i;
struct megasas_header *frame_hdr;
@ -650,15 +650,12 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
cpu_to_le32(lower_32_bits(ioc_init_handle));
init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
req_desc =
(union MEGASAS_REQUEST_DESCRIPTOR_UNION *)fusion->req_frames_desc;
req_desc->Words = 0;
req_desc->MFAIo.RequestFlags =
req_desc.Words = 0;
req_desc.MFAIo.RequestFlags =
(MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
cpu_to_le32s((u32 *)&req_desc->MFAIo);
req_desc->Words |= cpu_to_le64(cmd->frame_phys_addr);
cpu_to_le32s((u32 *)&req_desc.MFAIo);
req_desc.Words |= cpu_to_le64(cmd->frame_phys_addr);
/*
* disable the intr before firing the init frame
@ -672,8 +669,8 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
break;
}
instance->instancet->fire_cmd(instance, req_desc->u.low,
req_desc->u.high, instance->reg_set);
instance->instancet->fire_cmd(instance, req_desc.u.low,
req_desc.u.high, instance->reg_set);
wait_and_poll(instance, cmd);