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advansys: Check for DMA mapping errors 

DMA mapping might fail, so we need to check for errors here.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Hannes Reinecke 2015-04-24 13:18:39 +02:00 committed by James Bottomley
parent e14f66e921
commit 2207063443
1 changed files with 22 additions and 5 deletions
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27
drivers/scsi/advansys.c
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@ -7514,6 +7514,10 @@ static __le32 advansys_get_sense_buffer_dma(struct scsi_cmnd *scp)
struct asc_board *board = shost_priv(scp->device->host);
scp->SCp.dma_handle = dma_map_single(board->dev, scp->sense_buffer,
SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(board->dev, scp->SCp.dma_handle)) {
ASC_DBG(1, "failed to map sense buffer\n");
return 0;
}
dma_cache_sync(board->dev, scp->sense_buffer,
SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
return cpu_to_le32(scp->SCp.dma_handle);
@ -7546,6 +7550,8 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp,
ASC_TIDLUN_TO_IX(scp->device->id, scp->device->lun);
asc_scsi_q->q1.sense_addr = advansys_get_sense_buffer_dma(scp);
asc_scsi_q->q1.sense_len = SCSI_SENSE_BUFFERSIZE;
if (!asc_scsi_q->q1.sense_addr)
return ASC_BUSY;
/*
* If there are any outstanding requests for the current target,
@ -7567,7 +7573,10 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp,
/* Build ASC_SCSI_Q */
use_sg = scsi_dma_map(scp);
if (use_sg != 0) {
if (use_sg < 0) {
ASC_DBG(1, "failed to map sglist\n");
return ASC_BUSY;
} else if (use_sg > 0) {
int sgcnt;
struct scatterlist *slp;
struct asc_sg_head *asc_sg_head;
@ -7799,13 +7808,22 @@ adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp,
sense_addr = dma_map_single(boardp->dev, scp->sense_buffer,
SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(boardp->dev, sense_addr)) {
ASC_DBG(1, "failed to map sense buffer\n");
ASC_STATS(scp->device->host, adv_build_noreq);
return ASC_BUSY;
}
scsiqp->sense_addr = cpu_to_le32(sense_addr);
scsiqp->sense_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
/* Build ADV_SCSI_REQ_Q */
use_sg = scsi_dma_map(scp);
if (use_sg == 0) {
if (use_sg < 0) {
ASC_DBG(1, "failed to map SG list\n");
ASC_STATS(scp->device->host, adv_build_noreq);
return ASC_BUSY;
} else if (use_sg == 0) {
/* Zero-length transfer */
reqp->sgblkp = NULL;
scsiqp->data_cnt = 0;
@ -8473,11 +8491,10 @@ static int asc_execute_scsi_cmnd(struct scsi_cmnd *scp)
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. */
ret = asc_build_req(boardp, scp, &asc_scsi_q);
if (ret == ASC_ERROR) {
if (ret != ASC_NOERROR) {
ASC_STATS(scp->device->host, build_error);
return ASC_ERROR;
return ret;
}
ret = AscExeScsiQueue(asc_dvc, &asc_scsi_q);