[PATCH] ARM: imx6: Fix "BUG: scheduling while atomic" if PCIe switch is attached

[Lucas Stach]

Am Donnerstag, den 18.06.2015, 09:56 +0200 schrieb David Müller:
> This problem has already been reported as 
> https://bugzilla.kernel.org/show_bug.cgi?id=100031
> 
> Signed-off-by: David Müller <dave.mueller at gmx.ch>
> ---
>  drivers/pci/host/pci-imx6.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
> index fdb9536..c63691c 100644
> --- a/drivers/pci/host/pci-imx6.c
> +++ b/drivers/pci/host/pci-imx6.c
> @@ -489,7 +489,7 @@ static int imx6_pcie_link_up(struct pcie_port *pp)
>  		 * Wait a little bit, then re-check if the link finished
>  		 * the training.
>  		 */
> -		usleep_range(1000, 2000);
> +		mdelay(20);

While switching to mdelay might be the right thing to do here, you are
also changing the timeout. This is a change in behavior and so not okay.
Especially as you keep the CPU spinning for the duration of that
timeout.
 
>  	}
>  	/*
>  	 * From L0, initiate MAC entry to gen2 if EP/RC supports gen2.

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