From: Jack Morgenstein Date: Thu, 24 May 2012 13:08:09 +0000 (+0300) Subject: mlx4_core: Fix setting VL_cap in mlx4_SET_PORT wrapper flow X-Git-Tag: v3.5~226^2^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=edc4a67e15e34d2b3a2ab968625fd157751125d8;p=platform%2Fkernel%2Flinux-amlogic.git mlx4_core: Fix setting VL_cap in mlx4_SET_PORT wrapper flow Commit 096335b3f983 ("mlx4_core: Allow dynamic MTU configuration for IB ports") modifies the port VL setting. This exposes a bug in mlx4_common_set_port(), where the VL cap value passed in (inside the command mailbox) is incorrectly zeroed-out: mlx4_SET_PORT modifies the VL_cap field (byte 3 of the mailbox). Since the SET_PORT command is paravirtualized on the master as well as on the slaves, mlx4_SET_PORT_wrapper() is invoked on the master. This calls mlx4_common_set_port() where mailbox byte 3 gets overwritten by code which should only set a single bit in that byte (for the reset qkey counter flag) -- but instead overwrites the entire byte. The result is that when running in SR-IOV mode, the VL_cap will be set to zero -- fix this. Signed-off-by: Jack Morgenstein Signed-off-by: Or Gerlitz Signed-off-by: Roland Dreier --- diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c index 1fe2c7a..a8fb529 100644 --- a/drivers/net/ethernet/mellanox/mlx4/port.c +++ b/drivers/net/ethernet/mellanox/mlx4/port.c @@ -697,10 +697,10 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod, if (slave != dev->caps.function) memset(inbox->buf, 0, 256); if (dev->flags & MLX4_FLAG_OLD_PORT_CMDS) { - *(u8 *) inbox->buf = !!reset_qkey_viols << 6; + *(u8 *) inbox->buf |= !!reset_qkey_viols << 6; ((__be32 *) inbox->buf)[2] = agg_cap_mask; } else { - ((u8 *) inbox->buf)[3] = !!reset_qkey_viols; + ((u8 *) inbox->buf)[3] |= !!reset_qkey_viols; ((__be32 *) inbox->buf)[1] = agg_cap_mask; }