Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0cb637bf authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk
Browse files

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



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

Acked-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
[v2: s/ld/zs on the printk]
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 91fec0f5

lib/swiotlb.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -505,7 +505,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, 




not_found:

not_found:

	spin_unlock_irqrestore(&io_tlb_lock, flags);

	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);

	return SWIOTLB_MAP_ERROR;

	return SWIOTLB_MAP_ERROR;

found:

found:

	spin_unlock_irqrestore(&io_tlb_lock, flags);

	spin_unlock_irqrestore(&io_tlb_lock, flags);