> -----Original Message----- > From: Ioana Ciornei <[email protected]> > Sent: 09 December 2020 13:32 > To: [email protected]; Tom Rini <[email protected]>; u- > [email protected] > Cc: Madalin Bucur <[email protected]>; Florin Laurentiu Chiculita > <[email protected]>; Ioana Ciornei <[email protected]> > Subject: [PATCH] net: memac_phy: add a timeout to MDIO operations > > We have encountered circumstances when a board design does not include > pull-up resistors on the external MDIO buses which are not used. This > leads to the MDIO data line not being pulled-up, thus the MDIO controller > will always see the line as busy. > > Without a timeout in the MDIO bus driver, the execution is stuck in an > infinite loop when any access is initiated on that external bus. > > Add a timeout in the driver so that we are protected in this > circumstance. This is similar to what is being done in the Linux > xgmac_mdio driver. > > Signed-off-by: Ioana Ciornei <[email protected]> > --- > drivers/net/fm/memac_phy.c | 76 +++++++++++++++++++++++++++++--------- > 1 file changed, 58 insertions(+), 18 deletions(-)
Reviewed-by: Madalin Bucur <[email protected]>
