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SubjectRe: [PATCH] net: usb: dm9601: fix wrong return value in dm9601_mdio_read
Date
>>>>> "Javier" == Javier Carrasco <javier.carrasco.cruz@gmail.com> writes:

> The MII code does not check the return value of mdio_read (among
> others), and therefore no error code should be sent. A previous fix to
> the use of an uninitialized variable propagates negative error codes,
> that might lead to wrong operations by the MII library.

> An example of such issues is the use of mii_nway_restart by the dm9601
> driver. The mii_nway_restart function does not check the value returned
> by mdio_read, which in this case might be a negative number which could
> contain the exact bit the function checks (BMCR_ANENABLE = 0x1000).

> Return zero in case of error, as it is common practice in users of
> mdio_read to avoid wrong uses of the return value.

> Fixes: 8f8abb863fa5 ("net: usb: dm9601: fix uninitialized variable use in dm9601_mdio_read")
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>

Reviewed-by: Peter Korsgaard <peter@korsgaard.com>

--
Bye, Peter Korsgaard

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