[PATCH v2] powerpc/eeh: drop taken reference to driver on eeh_rmv_device

[Nishanth Aravamudan]

On 05.02.2014 [16:20:45 -0200], Thadeu Lima de Souza Cascardo wrote:
> Commit f5c57710dd62dd06f176934a8b4b8accbf00f9f8 ("powerpc/eeh: Use
> partial hotplug for EEH unaware drivers") introduces eeh_rmv_device,
> which may grab a reference to a driver, but not release it.
> 
> That prevents a driver from being removed after it has gone through EEH
> recovery.
> 
> This patch drops the reference if it was taken.
> 
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at linux.vnet.ibm.com>
> Acked-by: Gavin Shan <shangw at linux.vnet.ibm.com>
> ---
>  arch/powerpc/kernel/eeh_driver.c |    8 ++++++--
>  1 files changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
> index 7bb30dc..fdc679d 100644
> --- a/arch/powerpc/kernel/eeh_driver.c
> +++ b/arch/powerpc/kernel/eeh_driver.c
> @@ -362,9 +362,13 @@ static void *eeh_rmv_device(void *data, void *userdata)
>  	 */
>  	if (!dev || (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE))
>  		return NULL;
> +

This appears to be unnecessary whitespace change?

-Nish

>  	driver = eeh_pcid_get(dev);
> -	if (driver && driver->err_handler)
> -		return NULL;
> +	if (driver) {
> +		eeh_pcid_put(dev);
> +		if (driver->err_handler)
> +			return NULL;
> +	}
> 
>  	/* Remove it from PCI subsystem */
>  	pr_debug("EEH: Removing %s without EEH sensitive driver\n",
> -- 
> 1.7.1
> 
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