On 04/24/2015 06:56 PM, Florian Fainelli wrote:
Some systems using mdio-gpio may use gpio on message based busses, which require sleeping (e.g. gpio from an I2C I/O expander).
Since this driver does not use IRQ handler, it is safe to use the _cansleep suffixed gpio accessors.
Signed-off-by: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
Since this is down underneath the layer of an MII bus, you cannot universally say that these routines are always called in a sleepable context.
The PHY layer, and the driver itself above that, might call these routines from timers, interruptes etc.
The PHY library calls these routines from its state machine workqueue for that reason, or from process context (when invoked via ethtool ioctl). The only special case is phy_mac_interrupt() which is callable from interrupt context,
It is not (as we have discussed recently) -- cancel_work_sync() may sleep. WBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
