[SCSI] aha152x: remove static host array

Fix this driver not to use a static two element host array instead use
a list.  This should fix panic on multiple eject reinsert of the
pcmcia version of this device.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 24 insertions, 29 deletions

diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c
index f974869ea323..fb6a476eb873 100644
--- a/drivers/scsi/aha152x.c
+++ b/drivers/scsi/aha152x.c
@@ -253,6 +253,7 @@
 #include <linux/isapnp.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
+#include <linux/list.h>
 #include <asm/semaphore.h>
 #include <scsi/scsicam.h>
 
@@ -262,6 +263,8 @@
 #include <scsi/scsi_transport_spi.h>
 #include "aha152x.h"
 
+static LIST_HEAD(aha152x_host_list);
+
 
 /* DEFINES */
 
@@ -423,8 +426,6 @@ MODULE_DEVICE_TABLE(isapnp, id_table);
 
 #endif /* !PCMCIA */
 
-static int registered_count=0;
-static struct Scsi_Host *aha152x_host[2];
 static struct scsi_host_template aha152x_driver_template;
 
 /*
@@ -541,6 +542,7 @@ struct aha152x_hostdata {
 #ifdef __ISAPNP__
         struct pnp_dev *pnpdev;
 #endif
+        struct list_head host_list;
 };
 
 
@@ -755,20 +757,9 @@ static inline Scsi_Cmnd *remove_SC(Scsi_Cmnd **SC, Scsi_Cmnd *SCp)
         return ptr;
 }
 
-static inline struct Scsi_Host *lookup_irq(int irqno)
-{
-        int i;
-
-        for(i=0; i<ARRAY_SIZE(aha152x_host); i++)
-                if(aha152x_host[i] && aha152x_host[i]->irq==irqno)
-                        return aha152x_host[i];
-
-        return NULL;
-}
-
 static irqreturn_t swintr(int irqno, void *dev_id, struct pt_regs *regs)
 {
-        struct Scsi_Host *shpnt = lookup_irq(irqno);
+        struct Scsi_Host *shpnt = (struct Scsi_Host *)dev_id;
 
         if (!shpnt) {
                 printk(KERN_ERR "aha152x: catched software interrupt %d for unknown controller.\n", irqno);
@@ -791,10 +782,11 @@ struct Scsi_Host *aha152x_probe_one(struct aha152x_setup *setup)
                 return NULL;
         }
 
-        /* need to have host registered before triggering any interrupt */
-        aha152x_host[registered_count] = shpnt;
-
         memset(HOSTDATA(shpnt), 0, sizeof *HOSTDATA(shpnt));
+        INIT_LIST_HEAD(&HOSTDATA(shpnt)->host_list);
+
+        /* need to have host registered before triggering any interrupt */
+        list_add_tail(&HOSTDATA(shpnt)->host_list, &aha152x_host_list);
 
         shpnt->io_port   = setup->io_port;
         shpnt->n_io_port = IO_RANGE;
@@ -907,12 +899,10 @@ struct Scsi_Host *aha152x_probe_one(struct aha152x_setup *setup)
 
         scsi_scan_host(shpnt);
 
-        registered_count++;
-
         return shpnt;
 
 out_host_put:
-        aha152x_host[registered_count]=NULL;
+        list_del(&HOSTDATA(shpnt)->host_list);
         scsi_host_put(shpnt);
 
         return NULL;
@@ -937,6 +927,7 @@ void aha152x_release(struct Scsi_Host *shpnt)
 #endif
 
         scsi_remove_host(shpnt);
+        list_del(&HOSTDATA(shpnt)->host_list);
         scsi_host_put(shpnt);
 }
 
@@ -1459,9 +1450,12 @@ static struct work_struct aha152x_tq;
  */
 static void run(void)
 {
-        int i;
-        for (i = 0; i<ARRAY_SIZE(aha152x_host); i++) {
-                is_complete(aha152x_host[i]);
+        struct aha152x_hostdata *hd;
+
+        list_for_each_entry(hd, &aha152x_host_list, host_list) {
+                struct Scsi_Host *shost = container_of((void *)hd, struct Scsi_Host, hostdata);
+
+                is_complete(shost);
         }
 }
 
@@ -1471,7 +1465,7 @@ static void run(void)
  */
 static irqreturn_t intr(int irqno, void *dev_id, struct pt_regs *regs)
 {
-        struct Scsi_Host *shpnt = lookup_irq(irqno);
+        struct Scsi_Host *shpnt = (struct Scsi_Host *)dev_id;
         unsigned long flags;
         unsigned char rev, dmacntrl0;
 
@@ -3953,16 +3947,17 @@ static int __init aha152x_init(void)
 #endif
         }
 
-        return registered_count>0;
+        return 1;
 }
 
 static void __exit aha152x_exit(void)
 {
-        int i;
+        struct aha152x_hostdata *hd;
+
+        list_for_each_entry(hd, &aha152x_host_list, host_list) {
+                struct Scsi_Host *shost = container_of((void *)hd, struct Scsi_Host, hostdata);
 
-        for(i=0; i<ARRAY_SIZE(setup); i++) {
-                aha152x_release(aha152x_host[i]);
-                aha152x_host[i]=NULL;
+                aha152x_release(shost);
         }
 }