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

stable inclusion
from stable-v5.10.168
commit 491b7a5fc8e28ceb0688191d611fe8037905f0fb
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7URR4

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=491b7a5fc8e28ceb0688191d611fe8037905f0fb

----------------------------------------------------

[ Upstream commit b7e08a5a ]

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: e3cf00d0 ("IB/usnic: Add Cisco VIC low-level hardware driver")
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20230129093757.637354-1-yangyingliang@huawei.comSigned-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: Nzhaoxiaoqiang11 <zhaoxiaoqiang11@jd.com>

drivers/infiniband/hw/usnic/usnic_uiom.c

@@ -281,8 +281,8 @@ 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);
@@ -298,8 +298,8 @@ 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);