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Commit 250ae982 authored by Eddie Wai's avatar Eddie Wai Committed by James Bottomley
Browse files

[SCSI] bnx2i: Added chip cleanup for the remove module path 



In the case when an ep_connect request is interrupted due to route
request stall, if the iSCSI daemon is terminated by the user, the chip
will be left in a state which will not get cleaned up upon module
removal.  Upon module reload, when the same context id is used for a
new connection, chip panic would occur.

This patch adds chip cleanup in the module removal path.

Signed-off-by: default avatarEddie Wai <eddie.wai@broadcom.com>
Acked-by: default avatarBenjamin Li <benli@broadcom.com>
Reviewed-by: default avatarMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 2c2255e0

drivers/scsi/bnx2i/bnx2i_init.c

+34 −20
Original line number Diff line number Diff line
@@ -166,6 +166,38 @@ void bnx2i_start(void *handle) 
}





/**

 * bnx2i_chip_cleanup - local routine to handle chip cleanup

 * @hba:	Adapter instance to register

 *

 * Driver checks if adapter still has any active connections before

 *	executing the cleanup process

 */

static void bnx2i_chip_cleanup(struct bnx2i_hba *hba)

{

	struct bnx2i_endpoint *bnx2i_ep;

	struct list_head *pos, *tmp;



	if (hba->ofld_conns_active) {

		/* Stage to force the disconnection

		 * This is the case where the daemon is either slow or

		 * not present

		 */

		printk(KERN_ALERT "bnx2i: (%s) chip cleanup for %d active "

			"connections\n", hba->netdev->name,

			hba->ofld_conns_active);

		mutex_lock(&hba->net_dev_lock);

		list_for_each_safe(pos, tmp, &hba->ep_active_list) {

			bnx2i_ep = list_entry(pos, struct bnx2i_endpoint, link);

			/* Clean up the chip only */

			bnx2i_hw_ep_disconnect(bnx2i_ep);

			bnx2i_ep->cm_sk = NULL;

		}

		mutex_unlock(&hba->net_dev_lock);

	}

}





/**

 * bnx2i_stop - cnic callback to shutdown adapter instance

 * @handle:	transparent handle pointing to adapter structure
@@ -176,8 +208,6 @@ void bnx2i_start(void *handle) 
void bnx2i_stop(void *handle)

{

	struct bnx2i_hba *hba = handle;

	struct list_head *pos, *tmp;

	struct bnx2i_endpoint *bnx2i_ep;

	int conns_active;



	/* check if cleanup happened in GOING_DOWN context */
@@ -198,24 +228,7 @@ void bnx2i_stop(void *handle) 
		if (hba->ofld_conns_active == conns_active)

			break;

	}

	if (hba->ofld_conns_active) {

		/* Stage to force the disconnection

		 * This is the case where the daemon is either slow or

		 * not present

		 */

		printk(KERN_ALERT "bnx2i: Wait timeout, force all eps "

			"to disconnect (%d)\n", hba->ofld_conns_active);

		mutex_lock(&hba->net_dev_lock);

		list_for_each_safe(pos, tmp, &hba->ep_active_list) {

			bnx2i_ep = list_entry(pos, struct bnx2i_endpoint, link);

			/* Clean up the chip only */

			bnx2i_hw_ep_disconnect(bnx2i_ep);

		}

		mutex_unlock(&hba->net_dev_lock);

		if (hba->ofld_conns_active)

			printk(KERN_ERR "bnx2i: EP disconnect timeout (%d)!\n",

				hba->ofld_conns_active);

	}

	bnx2i_chip_cleanup(hba);



	/* This flag should be cleared last so that ep_disconnect() gracefully

	 * cleans up connection context
@@ -457,6 +470,7 @@ static void __exit bnx2i_mod_exit(void) 
		adapter_count--;



		if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {

			bnx2i_chip_cleanup(hba);

			hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);

			clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);

		}

drivers/scsi/bnx2i/bnx2i_iscsi.c

+3 −0
Original line number Diff line number Diff line
@@ -1953,6 +1953,9 @@ int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep) 
	if (!cnic)

		return 0;



	if (bnx2i_ep->state == EP_STATE_IDLE)

		return 0;



	if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))

		goto destroy_conn;