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Subject[PATCH] swiotlb: Don't DoS us with 'swiotlb buffer is full'
Date
There is no need for that so lets use ratelimiting.
Also add some extra information to be helpful.

CC: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
lib/swiotlb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index e4399fa..7c97bd2 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -505,7 +505,8 @@ 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");
+ if (printk_ratelimit())
+ dev_warn(hwdev, "swiotlb buffer is full (sz: %ld bytes)\n", size);
return SWIOTLB_MAP_ERROR;
found:
spin_unlock_irqrestore(&io_tlb_lock, flags);
--
1.8.3.1


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