[PATCH v3 8/9] powerpc/eeh: Factor out common code eeh_reset_device()

[Alexey Kardashevskiy]

On 21/3/18 1:06 pm, Sam Bobroff wrote:
> The caller will always pass NULL for 'rmv_data' when
> 'eeh_aware_driver' is true, so the first two calls to
> eeh_pe_dev_traverse() can be combined without changing behaviour as
> can the two arms of the final 'if' block.
> 
> This should not change behaviour.
> 
> Signed-off-by: Sam Bobroff <sam.bobroff at au1.ibm.com>


Reviewed-by: Alexey Kardashevskiy <aik at ozlabs.ru>


> ---
> ====== v2 -> v3: ======
> Corrected two missed cases of eeh_aware_driver -> driver_eeh_aware.
> 
>  arch/powerpc/kernel/eeh_driver.c | 32 ++++++++++----------------------
>  1 file changed, 10 insertions(+), 22 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
> index 93fc22e791fa..43ceb6263cd8 100644
> --- a/arch/powerpc/kernel/eeh_driver.c
> +++ b/arch/powerpc/kernel/eeh_driver.c
> @@ -647,16 +647,12 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus,
>  	 * into pci_hp_add_devices().
>  	 */
>  	eeh_pe_state_mark(pe, EEH_PE_KEEP);
> -	if (!driver_eeh_aware) {
> -		if (pe->type & EEH_PE_VF) {
> -			eeh_pe_dev_traverse(pe, eeh_rmv_device, NULL);
> -		} else {
> -			pci_lock_rescan_remove();
> -			pci_hp_remove_devices(bus);
> -			pci_unlock_rescan_remove();
> -		}
> -	} else {
> +	if (driver_eeh_aware || (pe->type & EEH_PE_VF)) {
>  		eeh_pe_dev_traverse(pe, eeh_rmv_device, rmv_data);
> +	} else {
> +		pci_lock_rescan_remove();
> +		pci_hp_remove_devices(bus);
> +		pci_unlock_rescan_remove();
>  	}
>  
>  	/*
> @@ -691,8 +687,9 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus,
>  	 * the device up before the scripts have taken it down,
>  	 * potentially weird things happen.
>  	 */
> -	if (!driver_eeh_aware) {
> -		pr_info("EEH: Sleep 5s ahead of complete hotplug\n");
> +	if (!driver_eeh_aware || rmv_data->removed) {
> +		pr_info("EEH: Sleep 5s ahead of %s hotplug\n",
> +			(driver_eeh_aware ? "partial" : "complete"));
>  		ssleep(5);
>  
>  		/*
> @@ -705,19 +702,10 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus,
>  		if (pe->type & EEH_PE_VF) {
>  			eeh_add_virt_device(edev, NULL);
>  		} else {
> -			eeh_pe_state_clear(pe, EEH_PE_PRI_BUS);
> +			if (!driver_eeh_aware)
> +				eeh_pe_state_clear(pe, EEH_PE_PRI_BUS);
>  			pci_hp_add_devices(bus);
>  		}
> -	} else if (rmv_data->removed) {
> -		pr_info("EEH: Sleep 5s ahead of partial hotplug\n");
> -		ssleep(5);
> -
> -		edev = list_first_entry(&pe->edevs, struct eeh_dev, list);
> -		eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL);
> -		if (pe->type & EEH_PE_VF)
> -			eeh_add_virt_device(edev, NULL);
> -		else
> -			pci_hp_add_devices(bus);
>  	}
>  	eeh_pe_state_clear(pe, EEH_PE_KEEP);
>  
> 


-- 
Alexey