From 16eecd9be4b05e3216b8b12707aa6f51fb197903 Mon Sep 17 00:00:00 2001 From: Anish Bhatt Date: Mon, 28 Jul 2014 20:57:07 -0700 Subject: [PATCH] dcbnl : Fix misleading dcb_app->priority explanation Current explanation of dcb_app->priority is wrong. It says priority is expected to be a 3-bit unsigned integer which is only true when working with DCBx-IEEE. Use of dcb_app->priority by DCBx-CEE expects it to be 802.1p user priority bitmap. Updated accordingly This affects the cxgb4 driver, but I will post those changes as part of a larger changeset shortly. Fixes: 3e29027af4372 ("dcbnl: add support for ieee8021Qaz attributes") Signed-off-by: Anish Bhatt Acked-by: John Fastabend Signed-off-by: David S. Miller --- include/uapi/linux/dcbnl.h | 3 ++- net/dcb/dcbnl.c | 5 +++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/include/uapi/linux/dcbnl.h b/include/uapi/linux/dcbnl.h index 6bb43382f3f3..e711f20dc522 100644 --- a/include/uapi/linux/dcbnl.h +++ b/include/uapi/linux/dcbnl.h @@ -148,7 +148,8 @@ struct cee_pfc { * * @selector: protocol identifier type * @protocol: protocol of type indicated - * @priority: 3-bit unsigned integer indicating priority + * @priority: 3-bit unsigned integer indicating priority for IEEE + * 8-bit 802.1p user priority bitmap for CEE * * ---- * Selector field values diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c index c34af7a1d2d4..ca11d283bbeb 100644 --- a/net/dcb/dcbnl.c +++ b/net/dcb/dcbnl.c @@ -1776,7 +1776,7 @@ EXPORT_SYMBOL(dcb_getapp); * * Priority 0 is an invalid priority in CEE spec. This routine * removes applications from the app list if the priority is - * set to zero. + * set to zero. Priority is expected to be 8-bit 802.1p user priority bitmap */ int dcb_setapp(struct net_device *dev, struct dcb_app *new) { @@ -1837,7 +1837,8 @@ EXPORT_SYMBOL(dcb_ieee_getapp_mask); * * This adds Application data to the list. Multiple application * entries may exists for the same selector and protocol as long - * as the priorities are different. + * as the priorities are different. Priority is expected to be a + * 3-bit unsigned integer */ int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new) { -- 2.20.1