Nikita Yushchenko 24e00f0fa9
net: ravb: Fix dma_addr_t truncation in error case ...
[ Upstream commit e327b2372bc0f18c30433ac40be07741b59231c5 ]
In ravb_start_xmit(), ravb driver uses u32 variable to store result of
dma_map_single() call. Since ravb hardware has 32-bit address fields in
descriptors, this works properly when mapping is successful - it is
platform's job to provide mapping addresses that fit into hardware
limitations.
However, in failure case dma_map_single() returns DMA_MAPPING_ERROR
constant that is 64-bit when dma_addr_t is 64-bit. Storing this constant
in u32 leads to truncation, and further call to dma_mapping_error()
fails to notice the error.
Fix that by storing result of dma_map_single() in a dma_addr_t
variable.
Fixes: c156633f13nikita.yoush@cogentembedded.com >
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se >
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru >
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
Signed-off-by: Sasha Levin <sashal@kernel.org >
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