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cnic: Add a signature to indicate valid doorbell offset.

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The buffer that is used to pass doorbell offset to the userspace UIO
driver may contain nonzero value in older versions of bnx2x driver.
Userspace cannot easily tell whether it contains a valid doorbell
offset or not.  With the added signature, userspace will only use
the doorbell offset if the signature is present.

Update version to 2.5.19.

Signed-off-by: Eddie Wai <eddie.wai@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eddie Wai 2013-12-31 23:18:34 -08:00 • committed by David S. Miller
parent 487d9edcd2
commit d15e2a92c4
3 changed files with 5 additions and 2 deletions
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1
drivers/net/ethernet/broadcom/cnic.c
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@ -5220,6 +5220,7 @@ static void cnic_init_rings(struct cnic_dev *dev)
cnic_ring_ctl(dev, cid, cli, 1);
*cid_ptr = cid >> 4;
*(cid_ptr + 1) = cid * bp->db_size;
*(cid_ptr + 2) = UIO_USE_TX_DOORBELL;
}
}