net: cavium: liquidio: Avoid dma_unmap_single on uninitialized ndata

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The label lio_xmit_failed is used 3 times through liquidio_xmit() but it
always makes a call to dma_unmap_single() using potentially
uninitialized variables from "ndata" variable. Out of the 3 gotos, 2 run
after ndata has been initialized, and had a prior dma_map_single() call.

Fix this by adding a new error label: lio_xmit_dma_failed which does
this dma_unmap_single() and then processed with the lio_xmit_failed
fallthrough.

Fixes: f21fb3ed36 ("Add support of Cavium Liquidio ethernet adapters")
Reported-by: coverity (CID 1309740)
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Florian Fainelli 2016-07-15 16:42:16 -07:00 • committed by David S. Miller

parent ea6ff112b0

commit 8e6ce7ebeb

1 changed files with 5 additions and 4 deletions

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9

drivers/net/ethernet/cavium/liquidio/lio_main.c

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