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[SCSI] libfc: fix retries with FDMI lport states 

The FC-GS-3 sepc requires to wait for least 3 times R_A_TOV per
sec 4.6.1 "If the Requesting_CT does not receive a Response
CT_IU from the Responding_CT within three times R_A_TOV,
it shall consider this to be a protocol error."

This means added four new states with management server
could add significant delay with multiple retries
on default 12 second timeout(3 * R_A_TOV), so instead
just skip these states on very first timeout on any of
these states to not stuck with states for such longer
period.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Tested-by: Marcus Dennis <marcusx.e.dennis@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Vasu Dev 2012-07-06 10:40:15 -07:00 committed by James Bottomley
parent db95fc004e
commit ac166d2fbd
1 changed files with 3 additions and 2 deletions
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5
drivers/scsi/libfc/fc_lport.c
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@ -1598,8 +1598,9 @@ static void fc_lport_timeout(struct work_struct *work)
case LPORT_ST_RPA:
case LPORT_ST_DHBA:
case LPORT_ST_DPRT:
fc_lport_enter_ms(lport, lport->state);
break;
FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n",
fc_lport_state(lport));
/* fall thru */
case LPORT_ST_SCR:
fc_lport_enter_scr(lport);
break;