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bnx2x: Correct number of MSI-X vectors for VFs 

Number of VFs in PCIe configuration space is zero-based. Driver incorrectly
sets the number of VFs to be larger by one than what actually is feasible by
HW, which might cause later VFs to fail to allocate their MSI-X interrupts.

Signed-off-by: Michal Kalderon <michals@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kalderon 2014-01-05 18:33:51 +02:00 committed by David S. Miller
parent e848582cee
commit 89e18ae6e6
1 changed files with 6 additions and 3 deletions
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9
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
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@ -3202,13 +3202,16 @@ int bnx2x_enable_sriov(struct bnx2x *bp)
bnx2x_iov_static_resc(bp, vf);
}
/* prepare msix vectors in VF configuration space */
/* prepare msix vectors in VF configuration space - the value in the
* PCI configuration space should be the index of the last entry,
* namely one less than the actual size of the table
*/
for (vf_idx = first_vf; vf_idx < first_vf + req_vfs; vf_idx++) {
bnx2x_pretend_func(bp, HW_VF_HANDLE(bp, vf_idx));
REG_WR(bp, PCICFG_OFFSET + GRC_CONFIG_REG_VF_MSIX_CONTROL,
num_vf_queues);
num_vf_queues - 1);
DP(BNX2X_MSG_IOV, "set msix vec num in VF %d cfg space to %d\n",
vf_idx, num_vf_queues);
vf_idx, num_vf_queues - 1);
}
bnx2x_pretend_func(bp, BP_ABS_FUNC(bp));