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authorAntoine Tenart <antoine.tenart@bootlin.com>2020-05-26 19:22:56 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-27 01:33:56 +0300
commita021ada2b7a3a79394ed2f476ec7615a184bb488 (patch)
treec72524f7dbd6cdcdd642e998732176679ce1d6ad /drivers/net/phy/Kconfig
parentd9c6de35e051c17474ec8a1fe2fdb8cd2b6f1a87 (diff)
downloadlinux-a021ada2b7a3a79394ed2f476ec7615a184bb488.tar.xz
net: phy: mscc-miim: read poll when high resolution timers are disabled
The driver uses a read polling mechanism to check the status of the MDIO bus, to know if it is ready to accept next commands. This polling mechanism uses usleep_delay() under the hood between reads which is fine as long as high resolution timers are enabled. Otherwise the delays will end up to be much longer than expected. This patch fixes this by using udelay() under the hood when CONFIG_HIGH_RES_TIMERS isn't enabled. This increases CPU usage. Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/Kconfig')
-rw-r--r--drivers/net/phy/Kconfig3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 2a32f26ead0b..047c27087b10 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -184,7 +184,8 @@ config MDIO_MSCC_MIIM
depends on HAS_IOMEM
help
This driver supports the MIIM (MDIO) interface found in the network
- switches of the Microsemi SoCs
+ switches of the Microsemi SoCs; it is recommended to switch on
+ CONFIG_HIGH_RES_TIMERS
config MDIO_MVUSB
tristate "Marvell USB to MDIO Adapter"