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path: root/drivers/scsi/advansys.c
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Diffstat (limited to 'drivers/scsi/advansys.c')
-rw-r--r--drivers/scsi/advansys.c88
1 files changed, 39 insertions, 49 deletions
diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c
index 3dd78561760..fd4d6695fea 100644
--- a/drivers/scsi/advansys.c
+++ b/drivers/scsi/advansys.c
@@ -380,7 +380,7 @@ typedef struct asc_sg_head {
ushort queue_cnt;
ushort entry_to_copy;
ushort res;
- ASC_SG_LIST sg_list[ASC_MAX_SG_LIST];
+ ASC_SG_LIST sg_list[0];
} ASC_SG_HEAD;
typedef struct asc_scsi_q {
@@ -2559,12 +2559,6 @@ static int asc_board_count;
/* Overrun buffer used by all narrow boards. */
static uchar overrun_buf[ASC_OVERRUN_BSIZE] = { 0 };
-/*
- * Global structures required to issue a command.
- */
-static ASC_SCSI_Q asc_scsi_q = { {0} };
-static ASC_SG_HEAD asc_sg_head = { 0 };
-
#ifdef ADVANSYS_DEBUG
static int asc_dbglvl = 3;
@@ -10192,39 +10186,28 @@ static int advansys_slave_configure(struct scsi_device *sdev)
return 0;
}
-/*
- * Build a request structure for the Asc Library (Narrow Board).
- *
- * The global structures 'asc_scsi_q' and 'asc_sg_head' are
- * used to build the request.
- *
- * If an error occurs, then return ASC_ERROR.
- */
-static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp)
+static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp,
+ struct asc_scsi_q *asc_scsi_q)
{
- /*
- * Mutually exclusive access is required to 'asc_scsi_q' and
- * 'asc_sg_head' until after the request is started.
- */
- memset(&asc_scsi_q, 0, sizeof(ASC_SCSI_Q));
+ memset(asc_scsi_q, 0, sizeof(*asc_scsi_q));
/*
* Point the ASC_SCSI_Q to the 'struct scsi_cmnd'.
*/
- asc_scsi_q.q2.srb_ptr = ASC_VADDR_TO_U32(scp);
+ asc_scsi_q->q2.srb_ptr = ASC_VADDR_TO_U32(scp);
/*
* Build the ASC_SCSI_Q request.
*/
- asc_scsi_q.cdbptr = &scp->cmnd[0];
- asc_scsi_q.q2.cdb_len = scp->cmd_len;
- asc_scsi_q.q1.target_id = ASC_TID_TO_TARGET_ID(scp->device->id);
- asc_scsi_q.q1.target_lun = scp->device->lun;
- asc_scsi_q.q2.target_ix =
+ asc_scsi_q->cdbptr = &scp->cmnd[0];
+ asc_scsi_q->q2.cdb_len = scp->cmd_len;
+ asc_scsi_q->q1.target_id = ASC_TID_TO_TARGET_ID(scp->device->id);
+ asc_scsi_q->q1.target_lun = scp->device->lun;
+ asc_scsi_q->q2.target_ix =
ASC_TIDLUN_TO_IX(scp->device->id, scp->device->lun);
- asc_scsi_q.q1.sense_addr =
+ asc_scsi_q->q1.sense_addr =
cpu_to_le32(virt_to_bus(&scp->sense_buffer[0]));
- asc_scsi_q.q1.sense_len = sizeof(scp->sense_buffer);
+ asc_scsi_q->q1.sense_len = sizeof(scp->sense_buffer);
/*
* If there are any outstanding requests for the current target,
@@ -10239,9 +10222,9 @@ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp)
*/
if ((boardp->dvc_var.asc_dvc_var.cur_dvc_qng[scp->device->id] > 0) &&
(boardp->reqcnt[scp->device->id] % 255) == 0) {
- asc_scsi_q.q2.tag_code = MSG_ORDERED_TAG;
+ asc_scsi_q->q2.tag_code = MSG_ORDERED_TAG;
} else {
- asc_scsi_q.q2.tag_code = MSG_SIMPLE_TAG;
+ asc_scsi_q->q2.tag_code = MSG_SIMPLE_TAG;
}
/*
@@ -10257,12 +10240,12 @@ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp)
dma_map_single(boardp->dev, scp->request_buffer,
scp->request_bufflen,
scp->sc_data_direction) : 0;
- asc_scsi_q.q1.data_addr = cpu_to_le32(scp->SCp.dma_handle);
- asc_scsi_q.q1.data_cnt = cpu_to_le32(scp->request_bufflen);
+ asc_scsi_q->q1.data_addr = cpu_to_le32(scp->SCp.dma_handle);
+ asc_scsi_q->q1.data_cnt = cpu_to_le32(scp->request_bufflen);
ASC_STATS_ADD(scp->device->host, cont_xfer,
ASC_CEILING(scp->request_bufflen, 512));
- asc_scsi_q.q1.sg_queue_cnt = 0;
- asc_scsi_q.sg_head = NULL;
+ asc_scsi_q->q1.sg_queue_cnt = 0;
+ asc_scsi_q->sg_head = NULL;
} else {
/*
* CDB scatter-gather request list.
@@ -10270,6 +10253,7 @@ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp)
int sgcnt;
int use_sg;
struct scatterlist *slp;
+ struct asc_sg_head *asc_sg_head;
slp = (struct scatterlist *)scp->request_buffer;
use_sg = dma_map_sg(boardp->dev, slp, scp->use_sg,
@@ -10287,28 +10271,31 @@ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp)
ASC_STATS(scp->device->host, sg_cnt);
- /*
- * Use global ASC_SG_HEAD structure and set the ASC_SCSI_Q
- * structure to point to it.
- */
- memset(&asc_sg_head, 0, sizeof(ASC_SG_HEAD));
+ asc_sg_head = kzalloc(sizeof(asc_scsi_q->sg_head) +
+ use_sg * sizeof(struct asc_sg_list), GFP_ATOMIC);
+ if (!asc_sg_head) {
+ dma_unmap_sg(boardp->dev, slp, scp->use_sg,
+ scp->sc_data_direction);
+ scp->result = HOST_BYTE(DID_SOFT_ERROR);
+ return ASC_ERROR;
+ }
- asc_scsi_q.q1.cntl |= QC_SG_HEAD;
- asc_scsi_q.sg_head = &asc_sg_head;
- asc_scsi_q.q1.data_cnt = 0;
- asc_scsi_q.q1.data_addr = 0;
+ asc_scsi_q->q1.cntl |= QC_SG_HEAD;
+ asc_scsi_q->sg_head = asc_sg_head;
+ asc_scsi_q->q1.data_cnt = 0;
+ asc_scsi_q->q1.data_addr = 0;
/* This is a byte value, otherwise it would need to be swapped. */
- asc_sg_head.entry_cnt = asc_scsi_q.q1.sg_queue_cnt = use_sg;
+ asc_sg_head->entry_cnt = asc_scsi_q->q1.sg_queue_cnt = use_sg;
ASC_STATS_ADD(scp->device->host, sg_elem,
- asc_sg_head.entry_cnt);
+ asc_sg_head->entry_cnt);
/*
* Convert scatter-gather list into ASC_SG_HEAD list.
*/
for (sgcnt = 0; sgcnt < use_sg; sgcnt++, slp++) {
- asc_sg_head.sg_list[sgcnt].addr =
+ asc_sg_head->sg_list[sgcnt].addr =
cpu_to_le32(sg_dma_address(slp));
- asc_sg_head.sg_list[sgcnt].bytes =
+ asc_sg_head->sg_list[sgcnt].bytes =
cpu_to_le32(sg_dma_len(slp));
ASC_STATS_ADD(scp->device->host, sg_xfer,
ASC_CEILING(sg_dma_len(slp), 512));
@@ -11338,14 +11325,17 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp)
if (ASC_NARROW_BOARD(boardp)) {
ASC_DVC_VAR *asc_dvc = &boardp->dvc_var.asc_dvc_var;
+ struct asc_scsi_q asc_scsi_q;
/* asc_build_req() can not return ASC_BUSY. */
- if (asc_build_req(boardp, scp) == ASC_ERROR) {
+ ret = asc_build_req(boardp, scp, &asc_scsi_q);
+ if (ret == ASC_ERROR) {
ASC_STATS(scp->device->host, build_error);
return ASC_ERROR;
}
ret = AscExeScsiQueue(asc_dvc, &asc_scsi_q);
+ kfree(asc_scsi_q.sg_head);
err_code = asc_dvc->err_code;
} else {
ADV_DVC_VAR *adv_dvc = &boardp->dvc_var.adv_dvc_var;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-04 01:08:29 +0000