Messages in this thread Patch in this message | | | From | "Dasgupta, Romit" <> | Date | Fri, 7 Nov 2008 21:12:43 +0530 | Subject | FW: [SMC911x ]fix for driver resume |
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Hi, I did not get any reply from anyone yet. Is there any MAINTAINER who can verify the patch below?
Regards, -Romit
-----Original Message----- From: Dasgupta, Romit Sent: Thursday, November 06, 2008 3:46 PM To: 'dustin@sensoria.com'; 'jgarzik@pobox.com'; 'nico@cam.org' Cc: 'netdev@vger.kernel.org'; linux-omap@vger.kernel.org Subject: [SMC911x ]fix for driver resume and compilation warning
Hi, I am trying out suspend, resume on an OMAP3 based board. What I see during resume is that the SMC911x driver resume routing gets stuck after trying to transmit the packet out of the controller. Some debug messages below:
--> smc911x_drv_resume eth0: --> smc911x_reset eth0: smc911x_reset timeout waiting for PM restore eth0: --> smc911x_enable eth0: --> smc911x_phy_configure() eth0: --> smc911x_phy_reset() eth0: phy caps=0x782d eth0: phy advertised caps=0x0de1 eth0: --> smc911x_phy_check_media smc911x_phy_read: phyaddr=0x1, phyreg=0x01, phydata=0x7809 smc911x_phy_read: phyaddr=0x1, phyreg=0x01, phydata=0x7809 eth0: link down Restarting tasks ... eth0: --> smc911x_hard_start_xmit eth0: --> smc911x_hardware_send_pkt eth0: --> smc911x_hard_start_xmit eth0: --> smc911x_hardware_send_pkt eth0: --> smc911x_hard_start_xmit eth0: --> smc911x_hardware_send_pkt nfs: server 172.24.190.217 not responding, still trying nfs: server 172.24.190.217 not responding, still trying
The following change makes it work fine: (The change within smc911x_drv_probe function was to get rid of a compilation warning). Additionally, the SMC9211 data sheet says that when we enter D2 sleep state, we need to set the EDPWRDOWN bit in the PHY Mode control/status register and clear it when we are back to D0. This is not done in the code as far as I can see. So does it mean that the PHY is not powered down but the controller is? I have another patch that fixes it. I will send that as well unless I am missing something.
Thanks, -Romit
Signed-off-by: Romit Dasgupta <romit@ti.com>
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c index 5051554..1f26ab0 100644 --- a/drivers/net/smc911x.c +++ b/drivers/net/smc911x.c @@ -2050,7 +2050,9 @@ err_out: */ static int smc911x_drv_probe(struct platform_device *pdev) { +#ifdef SMC_DYNAMIC_BUS_CONFIG struct smc911x_platdata *pd = pdev->dev.platform_data; +#endif struct net_device *ndev; struct resource *res; struct smc911x_local *lp; @@ -2182,9 +2184,9 @@ static int smc911x_drv_resume(struct platform_device *dev) if (netif_running(ndev)) { smc911x_reset(ndev); - smc911x_enable(ndev); if (lp->phy_type != 0) smc911x_phy_configure(&lp->phy_configure); + smc911x_enable(ndev); netif_device_attach(ndev); } }
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