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Subject[RFC 1/2] of: reserved_mem: check return value of_dma_configure
Date
In commit <7b07cbefb6>("iommu: of: Handle IOMMU lookup failure
with deferred probing or error"), there is possibility that
of_dma_configure may fail. So in of_reserved_mem_device_init_by_idx,
also need to propagate the return value of_dma_configure to caller,
when need to use reserved memory for a device which needs iommu.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/of/of_reserved_mem.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 22b75c82e377..61523819b50e 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -357,9 +357,12 @@ int of_reserved_mem_device_init_by_idx(struct device *dev,
/* ensure that dma_ops is set for virtual devices
* using reserved memory
*/
- of_dma_configure(dev, np);
-
- dev_info(dev, "assigned reserved memory node %s\n", rmem->name);
+ ret = of_dma_configure(dev, np);
+ if (ret)
+ of_reserved_mem_device_release(dev);
+ else
+ dev_info(dev, "assigned reserved memory node %s\n",
+ rmem->name);
} else {
kfree(rd);
}
--
2.14.1
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