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[SCSI] hpsa: check for dma_mapping_error in hpsa_map_sg_chain_block 

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Stephen M. Cameron 2013-02-20 11:24:46 -06:00 committed by James Bottomley
parent a2dac136c4
commit e2bea6df32
1 changed files with 12 additions and 2 deletions
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14
drivers/scsi/hpsa.c
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@ -1131,7 +1131,7 @@ clean:
return -ENOMEM; return -ENOMEM;
} }
static void hpsa_map_sg_chain_block(struct ctlr_info *h, static int hpsa_map_sg_chain_block(struct ctlr_info *h,
struct CommandList *c) struct CommandList *c)
{ {
struct SGDescriptor *chain_sg, *chain_block; struct SGDescriptor *chain_sg, *chain_block;
@ -1144,8 +1144,15 @@ static void hpsa_map_sg_chain_block(struct ctlr_info *h,
(c->Header.SGTotal - h->max_cmd_sg_entries); (c->Header.SGTotal - h->max_cmd_sg_entries);
temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len, temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
PCI_DMA_TODEVICE); PCI_DMA_TODEVICE);
if (dma_mapping_error(&h->pdev->dev, temp64)) {
/* prevent subsequent unmapping */
chain_sg->Addr.lower = 0;
chain_sg->Addr.upper = 0;
return -1;
}
chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL); chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL); chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
return 0;
} }
static void hpsa_unmap_sg_chain_block(struct ctlr_info *h, static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
@ -2123,7 +2130,10 @@ static int hpsa_scatter_gather(struct ctlr_info *h,
if (chained) { if (chained) {
cp->Header.SGList = h->max_cmd_sg_entries; cp->Header.SGList = h->max_cmd_sg_entries;
cp->Header.SGTotal = (u16) (use_sg + 1); cp->Header.SGTotal = (u16) (use_sg + 1);
hpsa_map_sg_chain_block(h, cp); if (hpsa_map_sg_chain_block(h, cp)) {
scsi_dma_unmap(cmd);
return -1;
}
return 0; return 0;
} }