[SCSI] qla4xxx: ql4_os.c bugfixes

Free memory resources after invoking free_irq() in
qla4xxx_free_adapter(). QLA4xxx has two pci functions per port
(Ethernet and iSCSI). When one of these PCI functions issues a HBA
reset, all other functions are notified and need to acknowledge and
re-initialize. During module qla4xxx_remove_adapter() gets
invoked. This function needs to wait if it is currently responding to
a reset from another function.

Signed-off-by: David Somayajulu <[e-mail]>
Signed-off-by: Mike Christie <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/qla4xxx/ql4_os.c

···
 #include <scsi/scsicam.h>
 
 #include "ql4_def.h"
+#include "ql4_version.h"
+#include "ql4_glbl.h"
+#include "ql4_dbg.h"
+#include "ql4_inline.h"
 
 /*
  * Driver version
···
 	return stat;
 }
 
-static void qla4xxx_hw_reset(struct scsi_qla_host *ha)
+void qla4xxx_hw_reset(struct scsi_qla_host *ha)
 {
 	uint32_t ctrl_status;
 	unsigned long flags = 0;
···
 	if (ha->timer_active)
 		qla4xxx_stop_timer(ha);
 
-	/* free extra memory */
-	qla4xxx_mem_free(ha);
-
 	/* Detach interrupts */
 	if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
 		free_irq(ha->pdev->irq, ha);
+
+	/* free extra memory */
+	qla4xxx_mem_free(ha);
 
 	pci_disable_device(ha->pdev);
 
···
 	struct scsi_qla_host *ha;
 
 	ha = pci_get_drvdata(pdev);
+
+	qla4xxx_disable_intrs(ha);
+
+	while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
+		ssleep(1);
 
 	/* remove devs from iscsi_sessions to scsi_devices */
 	qla4xxx_free_ddb_list(ha);