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bnx2x: Prevent IOV if no entries in CAM

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It's possible there's a bad chip configuration which will result with
PCIe IOV capabilities, but with no available interrupts for VFs.

In such case, we want to gracefully prevent the PF from initializing its
IOV capabilities rather than encounter difficulties further along the way.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuval Mintz 2014-08-17 16:47:48 +03:00 committed by David S. Miller
parent e261199872
commit 0d8de80f5c
1 changed files with 7 additions and 2 deletions
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9
drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
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@ -1125,7 +1125,7 @@ static int bnx2x_ari_enabled(struct pci_dev *dev)
return dev->bus->self && dev->bus->self->ari_enabled;
}
static void
static int
bnx2x_get_vf_igu_cam_info(struct bnx2x *bp)
{
int sb_id;
@ -1150,6 +1150,7 @@ bnx2x_get_vf_igu_cam_info(struct bnx2x *bp)
GET_FIELD((val), IGU_REG_MAPPING_MEMORY_VECTOR));
}
DP(BNX2X_MSG_IOV, "vf_sbs_pool is %d\n", BP_VFDB(bp)->vf_sbs_pool);
return BP_VFDB(bp)->vf_sbs_pool;
}
static void __bnx2x_iov_free_vfdb(struct bnx2x *bp)
@ -1314,7 +1315,11 @@ int bnx2x_iov_init_one(struct bnx2x *bp, int int_mode_param,
}
/* re-read the IGU CAM for VFs - index and abs_vfid must be set */
bnx2x_get_vf_igu_cam_info(bp);
if (!bnx2x_get_vf_igu_cam_info(bp)) {
BNX2X_ERR("No entries in IGU CAM for vfs\n");
err = -EINVAL;
goto failed;
}
/* allocate the queue arrays for all VFs */
bp->vfdb->vfqs = kzalloc(