[PATCH] swiotlb: Don't DoS us with 'swiotlb buffer is full' (v2)

From: Konrad Rzeszutek Wilk
Date: Mon Dec 16 2013 - 14:05:01 EST

There is no need for that so lets use ratelimiting.
Also add some extra information to be helpful.

CC: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
[v2: s/ld/zs on the printk]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
lib/swiotlb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index e4399fa..4634ac9 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -505,7 +505,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,

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: %zd bytes)\n", size);
spin_unlock_irqrestore(&io_tlb_lock, flags);

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