[PATCH] powerpc/fsl-pci: Correct the comparison of the LTSSM

[Edward L Swarthout]

From: Scott Wood:
>On Mon, 2016-02-01 at 03:57 +0000, Zhiqiang Hou wrote:
>> Any comments?
>
> Only that it was submitted too late for the last merge window, and I have not
> yet begun processing patches for the next one.  If you meant this to be a fix
> important enough to go in outside the merge window, it's missing any statement
> of what the actual symptoms are.
>
> > -----Original Message-----
> > From: Zhiqiang Hou [mailto:Zhiqiang.Hou at freescale.com]
> > To: linuxppc-dev at lists.ozlabs.org; benh at kernel.crashing.org;
> > Subject: [PATCH] powerpc/fsl-pci: Correct the comparison of the LTSSM
> >
> > Only the value PCIE_LTSSM_L0 stands for the link is up, instead of >=
> > PCIE_LTSSM_L0.
> >
> > diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
> > @@ -73,7 +73,7 @@ static int fsl_pcie_check_link(struct pci_controller
> >                     early_read_config_dword(hose, 0, 0, PCIE_LTSSM,
> > -           if (val < PCIE_LTSSM_L0)
> > +           if (val != PCIE_LTSSM_L0)
> >                     return 1;

This patch is incorrect as there are actually two states L0 and L0s (standby) 
that indicate an active link (a LTSSM value of 0x11 or  0x12).

The next user manual revision should contain this detail.

Ed