The caller of 'megasas_map_sgl' will only check if the return is zero or not. If it return 0 it means success, as in the next patch we will consider 'iov_count=0' is an error, so let's return -1 to indicate a failure.
Signed-off-by: Li Qiang <[email protected]> --- hw/scsi/megasas.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c index 5cfd1bf22e..d6c9680c36 100644 --- a/hw/scsi/megasas.c +++ b/hw/scsi/megasas.c @@ -281,7 +281,7 @@ static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl) if (iov_count > MEGASAS_MAX_SGE) { trace_megasas_iovec_sgl_overflow(cmd->index, iov_count, MEGASAS_MAX_SGE); - return iov_count; + return -1; } pci_dma_sglist_init(&cmd->qsg, PCI_DEVICE(s), iov_count); for (i = 0; i < iov_count; i++) { @@ -311,7 +311,7 @@ static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl) return 0; unmap: qemu_sglist_destroy(&cmd->qsg); - return iov_count - i; + return -1; } /* -- 2.17.1
