[Xen-devel] [PATCH v6 14/19] swiotlb: print a warning when the swiotlb is full

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 drivers/xen/swiotlb-xen.c |    1 +
 lib/swiotlb.c             |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 96ad316..790c2eb 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -674,6 +674,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct 
scatterlist *sgl,
                                                                 sg->length,
                                                                 dir);
                        if (map == SWIOTLB_MAP_ERROR) {
+                               pr_warn("swiotlb buffer is full\n");
                                /* Don't panic here, we expect map_sg users
                                   to do proper error handling. */
                                xen_swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir,
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index eb45d17..f06da0d 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -502,6 +502,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
 
 not_found:
        spin_unlock_irqrestore(&io_tlb_lock, flags);
+       pr_warn("swiotlb buffer is full\n");
        return SWIOTLB_MAP_ERROR;
 found:
        spin_unlock_irqrestore(&io_tlb_lock, flags);
-- 
1.7.2.5


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