From: Michael Chan Date: Wed, 8 Jun 2011 19:29:33 +0000 (+0000) Subject: cnic: Fix race conditions with firmware X-Git-Tag: MMI-PSA29.97-13-9~18929^2~450^2~43 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=101c40c8cb0d10c30f423805f9f5b7a75956832d;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git cnic: Fix race conditions with firmware During iSCSI connection terminations, if the target is also terminating at about the same time, the firmware may not complete the driver's request to close or reset the connection. This is fixed by handling other events (instead of the expected completion event) as an indication that the driver's request has been rejected. Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- diff --git a/drivers/net/cnic.c b/drivers/net/cnic.c index 5c0a669dfa5f..ea7245c5fb69 100644 --- a/drivers/net/cnic.c +++ b/drivers/net/cnic.c @@ -3767,7 +3767,13 @@ static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe) break; case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED: - cnic_cm_upcall(cp, csk, opcode); + /* after we already sent CLOSE_REQ */ + if (test_bit(CNIC_F_BNX2X_CLASS, &dev->flags) && + !test_bit(SK_F_OFFLD_COMPLETE, &csk->flags) && + csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP) + cp->close_conn(csk, L4_KCQE_OPCODE_VALUE_RESET_COMP); + else + cnic_cm_upcall(cp, csk, opcode); break; } csk_put(csk); @@ -3821,12 +3827,14 @@ static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode) } /* 1. If event opcode matches the expected event in csk->state - * 2. If the expected event is CLOSE_COMP, we accept any event + * 2. If the expected event is CLOSE_COMP or RESET_COMP, we accept any + * event * 3. If the expected event is 0, meaning the connection was never * never established, we accept the opcode from cm_abort. */ if (opcode == csk->state || csk->state == 0 || - csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP) { + csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP || + csk->state == L4_KCQE_OPCODE_VALUE_RESET_COMP) { if (!test_and_set_bit(SK_F_CLOSING, &csk->flags)) { if (csk->state == 0) csk->state = opcode;