[dpdk-dev] [PATCH v4 3/3] ixgbe: fix incorrect max tx queue number

[Mcnamara, John]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Pablo de Lara
> Sent: Thursday, March 24, 2016 3:22 PM
> To: dev at dpdk.org
> Cc: Lu, Wenzhuo <wenzhuo.lu at intel.com>; Richardson, Bruce
> <bruce.richardson at intel.com>; De Lara Guarch, Pablo
> <pablo.de.lara.guarch at intel.com>
> Subject: [dpdk-dev] [PATCH v4 3/3] ixgbe: fix incorrect max tx queue
> number
> 
> From: Wenzhuo Lu <wenzhuo.lu at intel.com>
> 
> IXGBE supports 128 TX queues. However, the full 128 queues are only
> available in VT and DCB mode.
> In normal default "none" mode (VT/DCB off) the maximum number of available
> queues is only 64.
> IXGBE doesn't check the mode when reporting the available number of
> queues. If a queue larger than 64 is used in default mode, the TX packets
> will be dropped silently.
> 
> This change adds a check to forbid using a queue number larger than 64
> during device configuration (in default mode), so that the problem is
> reported as early as possible.
> 
> Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>

Acked-by: John McNamara <john.mcnamara at intel.com>