RDMA/usnic: use iommu_map_atomic() under spin_lock()

usnic_uiom_map_sorted_intervals() is called under spin_lock(), iommu_map()
might sleep, use iommu_map_atomic() to avoid potential sleep in atomic
context.

Fixes: e3cf00d ("IB/usnic: Add Cisco VIC low-level hardware driver")
Signed-off-by: Yang Yingliang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Leon Romanovsky <[email protected]>

Author: Yang Yingliang

drivers/infiniband/hw/usnic/usnic_uiom.c

@@ -276,8 +276,8 @@ static int usnic_uiom_map_sorted_intervals(struct list_head *intervals,
 				size = pa_end - pa_start + PAGE_SIZE;
 				usnic_dbg("va 0x%lx pa %pa size 0x%zx flags 0x%x",
 					va_start, &pa_start, size, flags);
-				err = iommu_map(pd->domain, va_start, pa_start,
-							size, flags);
+				err = iommu_map_atomic(pd->domain, va_start,
+						       pa_start, size, flags);
 				if (err) {
 					usnic_err("Failed to map va 0x%lx pa %pa size 0x%zx with err %d\n",
 						va_start, &pa_start, size, err);
@@ -293,8 +293,8 @@ static int usnic_uiom_map_sorted_intervals(struct list_head *intervals,
 				size = pa - pa_start + PAGE_SIZE;
 				usnic_dbg("va 0x%lx pa %pa size 0x%zx flags 0x%x\n",
 					va_start, &pa_start, size, flags);
-				err = iommu_map(pd->domain, va_start, pa_start,
-						size, flags);
+				err = iommu_map_atomic(pd->domain, va_start,
+						       pa_start, size, flags);
 				if (err) {
 					usnic_err("Failed to map va 0x%lx pa %pa size 0x%zx with err %d\n",
 						va_start, &pa_start, size, err);