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[SCSI] libfc: don't exch_done() on invalid sequence ptr

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The lport_recv(), i.e., fc_lport_recv_req() may get called w/o the sequence ptr
being set in fr_seq(), particularly in the case of vn2vn mode, this may happen
if the passive fcp provider, e.g., tcm_fc, has not been registered yet.

Signed-off-by: Yi Zou <[email protected]>
Tested-by: Ross Brattain <[email protected]>
Signed-off-by: Robert Love <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Yi Zou 2012-07-06 10:40:26 -07:00 • committed by James Bottomley
commit db95fc004e
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/libfc/fc_lport.c
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@ -980,7 +980,8 @@ drop:
rcu_read_unlock();
FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
fc_frame_free(fp);
lport->tt.exch_done(sp);
if (sp)
lport->tt.exch_done(sp);
}
/**