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net: bnxt: always return values from _bnxt_get_max_rings

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Newly added code in the bnxt driver uses a couple of variables that
are never initialized when CONFIG_BNXT_SRIOV is not set, and gcc
correctly warns about that:

In file included from include/linux/list.h:8:0,
                 from include/linux/module.h:9,
                 from drivers/net/ethernet/broadcom/bnxt/bnxt.c:10:
drivers/net/ethernet/broadcom/bnxt/bnxt.c: In function 'bnxt_get_max_rings':
include/linux/kernel.h:794:26: warning: 'cp' may be used uninitialized in this function [-Wmaybe-uninitialized]
include/linux/kernel.h:794:26: warning: 'tx' may be used uninitialized in this function [-Wmaybe-uninitialized]
drivers/net/ethernet/broadcom/bnxt/bnxt.c:5730:11: warning: 'rx' may be used uninitialized in this function [-Wmaybe-uninitialized]
drivers/net/ethernet/broadcom/bnxt/bnxt.c:5736:6: note: 'rx' was declared here

This changes the condition so that we fall back to using the PF
data if VF is not available, and always initialize the variables
to something useful.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 6e6c5a57fb ("bnxt_en: Modify bnxt_get_max_rings() to support shared or non shared rings.")
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2016-01-12 16:05:08 +01:00 committed by David S. Miller
parent 229394e8e6
commit 415b6f19e8
1 changed files with 9 additions and 7 deletions
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16
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -5711,21 +5711,23 @@ static void _bnxt_get_max_rings(struct bnxt *bp, int *max_rx, int *max_tx,
{ {
int max_ring_grps = 0; int max_ring_grps = 0;
if (BNXT_PF(bp)) {
*max_tx = bp->pf.max_tx_rings;
*max_rx = bp->pf.max_rx_rings;
*max_cp = min_t(int, bp->pf.max_irqs, bp->pf.max_cp_rings);
*max_cp = min_t(int, *max_cp, bp->pf.max_stat_ctxs);
max_ring_grps = bp->pf.max_hw_ring_grps;
} else {
#ifdef CONFIG_BNXT_SRIOV #ifdef CONFIG_BNXT_SRIOV
if (!BNXT_PF(bp)) {
*max_tx = bp->vf.max_tx_rings; *max_tx = bp->vf.max_tx_rings;
*max_rx = bp->vf.max_rx_rings; *max_rx = bp->vf.max_rx_rings;
*max_cp = min_t(int, bp->vf.max_irqs, bp->vf.max_cp_rings); *max_cp = min_t(int, bp->vf.max_irqs, bp->vf.max_cp_rings);
*max_cp = min_t(int, *max_cp, bp->vf.max_stat_ctxs); *max_cp = min_t(int, *max_cp, bp->vf.max_stat_ctxs);
max_ring_grps = bp->vf.max_hw_ring_grps; max_ring_grps = bp->vf.max_hw_ring_grps;
} else
#endif #endif
{
*max_tx = bp->pf.max_tx_rings;
*max_rx = bp->pf.max_rx_rings;
*max_cp = min_t(int, bp->pf.max_irqs, bp->pf.max_cp_rings);
*max_cp = min_t(int, *max_cp, bp->pf.max_stat_ctxs);
max_ring_grps = bp->pf.max_hw_ring_grps;
} }
if (bp->flags & BNXT_FLAG_AGG_RINGS) if (bp->flags & BNXT_FLAG_AGG_RINGS)
*max_rx >>= 1; *max_rx >>= 1;
*max_rx = min_t(int, *max_rx, max_ring_grps); *max_rx = min_t(int, *max_rx, max_ring_grps);