scsi_dma_map() returns -1 if an error occurred (zero means that the
command has no data). So the following current code can't catch an
error:
sges_left = scsi_dma_map(scmd);
if (!sges_left) {
sdev_printk(KERN_ERR, scmd->device, "pci_map_sg"
" failed: request for %d bytes!\n", scsi_bufflen(scmd));
return -ENOMEM;
}
Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
---
drivers/scsi/mpt2sas/mpt2sas_scsih.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index c7ec3f1..99d189d 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -987,7 +987,7 @@ _scsih_build_scatter_gather(struct MPT2SAS_ADAPTER *ioc,
u32 chain_offset;
u32 chain_length;
u32 chain_flags;
- u32 sges_left;
+ int sges_left;
u32 sges_in_segment;
u32 sgl_flags;
u32 sgl_flags_last_element;
@@ -1008,7 +1008,7 @@ _scsih_build_scatter_gather(struct MPT2SAS_ADAPTER *ioc,
sg_scmd = scsi_sglist(scmd);
sges_left = scsi_dma_map(scmd);
- if (!sges_left) {
+ if (sges_left < 0) {
sdev_printk(KERN_ERR, scmd->device, "pci_map_sg"
" failed: request for %d bytes!\n", scsi_bufflen(scmd));
return -ENOMEM;
--
1.6.5
--
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