From: Colin Ian King <colin.k...@canonical.com>
[ Upstream commit f49c7faf776f16607c948d852a03b04a88c3b583 ]
Currently invalid CPU addresses are not being sanity checked resulting in
SATA setup failure on a SynQuacer SC2A11 development machine. The original
check was removed by and earlier commit, so add a sanity check back in
to avoid this regression.
Fixes: 7a8b64d17e35 ("of/address: use range parser for of_dma_get_range")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
Link: https://lore.kernel.org/r/20200817113208.523805-1-colin.k...@canonical.com
Signed-off-by: Rob Herring <r...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/of/address.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 8eea3f6e29a44..340d3051b1ce2 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -980,6 +980,11 @@ int of_dma_get_range(struct device_node *np, u64
*dma_addr, u64 *paddr, u64 *siz
/* Don't error out as we'd break some existing DTs */
continue;
}
+ if (range.cpu_addr == OF_BAD_ADDR) {
+ pr_err("translation of DMA address(%llx) to CPU address
failed node(%pOF)\n",
+ range.bus_addr, node);
+ continue;
+ }
dma_offset = range.cpu_addr - range.bus_addr;
/* Take lower and upper limits */
--
2.25.1
