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Subject[PATCH v8 15/19] swiotlb: print a warning when the swiotlb is full
Date
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

Changes in v7:
- use dev_warn instead of pr_warn.
---
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 4221cb5..4d50058 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -542,6 +542,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
sg->length,
dir);
if (map == SWIOTLB_MAP_ERROR) {
+ dev_warn(hwdev, "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 4e8686c..cdc051e 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);
+ dev_warn(hwdev, "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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