1 files changed, 41 insertions, 34 deletions

diff --git a/drivers/scsi/a2091.c b/drivers/scsi/a2091.c
index fc4fce99528e..1bb5d3f0e260 100644
--- a/drivers/scsi/a2091.c
+++ b/drivers/scsi/a2091.c
@@ -16,11 +16,16 @@
 #include "a2091.h"
 
 
+struct a2091_hostdata {
+        struct WD33C93_hostdata wh;
+        struct a2091_scsiregs *regs;
+};
+
 static irqreturn_t a2091_intr(int irq, void *data)
 {
         struct Scsi_Host *instance = data;
-        struct a2091_scsiregs *regs = (struct a2091_scsiregs *)(instance->base);
-        unsigned int status = regs->ISTR;
+        struct a2091_hostdata *hdata = shost_priv(instance);
+        unsigned int status = hdata->regs->ISTR;
         unsigned long flags;
 
         if (!(status & (ISTR_INT_F | ISTR_INT_P)) || !(status & ISTR_INTS))
@@ -35,38 +40,39 @@ static irqreturn_t a2091_intr(int irq, void *data)
 static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
 {
         struct Scsi_Host *instance = cmd->device->host;
-        struct WD33C93_hostdata *hdata = shost_priv(instance);
-        struct a2091_scsiregs *regs = (struct a2091_scsiregs *)(instance->base);
+        struct a2091_hostdata *hdata = shost_priv(instance);
+        struct WD33C93_hostdata *wh = &hdata->wh;
+        struct a2091_scsiregs *regs = hdata->regs;
         unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
         unsigned long addr = virt_to_bus(cmd->SCp.ptr);
 
         /* don't allow DMA if the physical address is bad */
         if (addr & A2091_XFER_MASK) {
-                hdata->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
-                hdata->dma_bounce_buffer = kmalloc(hdata->dma_bounce_len,
-                                                   GFP_KERNEL);
+                wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
+                wh->dma_bounce_buffer = kmalloc(wh->dma_bounce_len,
+                                                GFP_KERNEL);
 
                 /* can't allocate memory; use PIO */
-                if (!hdata->dma_bounce_buffer) {
-                        hdata->dma_bounce_len = 0;
+                if (!wh->dma_bounce_buffer) {
+                        wh->dma_bounce_len = 0;
                         return 1;
                 }
 
                 /* get the physical address of the bounce buffer */
-                addr = virt_to_bus(hdata->dma_bounce_buffer);
+                addr = virt_to_bus(wh->dma_bounce_buffer);
 
                 /* the bounce buffer may not be in the first 16M of physmem */
                 if (addr & A2091_XFER_MASK) {
                         /* we could use chipmem... maybe later */
-                        kfree(hdata->dma_bounce_buffer);
-                        hdata->dma_bounce_buffer = NULL;
-                        hdata->dma_bounce_len = 0;
+                        kfree(wh->dma_bounce_buffer);
+                        wh->dma_bounce_buffer = NULL;
+                        wh->dma_bounce_len = 0;
                         return 1;
                 }
 
                 if (!dir_in) {
                         /* copy to bounce buffer for a write */
-                        memcpy(hdata->dma_bounce_buffer, cmd->SCp.ptr,
+                        memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,
                                cmd->SCp.this_residual);
                 }
         }
@@ -76,7 +82,7 @@ static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
                 cntr |= CNTR_DDIR;
 
         /* remember direction */
-        hdata->dma_dir = dir_in;
+        wh->dma_dir = dir_in;
 
         regs->CNTR = cntr;
 
@@ -100,20 +106,21 @@ static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
 static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
                      int status)
 {
-        struct WD33C93_hostdata *hdata = shost_priv(instance);
-        struct a2091_scsiregs *regs = (struct a2091_scsiregs *)(instance->base);
+        struct a2091_hostdata *hdata = shost_priv(instance);
+        struct WD33C93_hostdata *wh = &hdata->wh;
+        struct a2091_scsiregs *regs = hdata->regs;
 
         /* disable SCSI interrupts */
         unsigned short cntr = CNTR_PDMD;
 
-        if (!hdata->dma_dir)
+        if (!wh->dma_dir)
                 cntr |= CNTR_DDIR;
 
         /* disable SCSI interrupts */
         regs->CNTR = cntr;
 
         /* flush if we were reading */
-        if (hdata->dma_dir) {
+        if (wh->dma_dir) {
                 regs->FLUSH = 1;
                 while (!(regs->ISTR & ISTR_FE_FLG))
                         ;
@@ -129,13 +136,13 @@ static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
         regs->CNTR = CNTR_PDMD | CNTR_INTEN;
 
         /* copy from a bounce buffer, if necessary */
-        if (status && hdata->dma_bounce_buffer) {
-                if (hdata->dma_dir)
-                        memcpy(SCpnt->SCp.ptr, hdata->dma_bounce_buffer,
+        if (status && wh->dma_bounce_buffer) {
+                if (wh->dma_dir)
+                        memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,
                                SCpnt->SCp.this_residual);
-                kfree(hdata->dma_bounce_buffer);
-                hdata->dma_bounce_buffer = NULL;
-                hdata->dma_bounce_len = 0;
+                kfree(wh->dma_bounce_buffer);
+                wh->dma_bounce_buffer = NULL;
+                wh->dma_bounce_len = 0;
         }
 }
 
@@ -178,32 +185,32 @@ static int __devinit a2091_probe(struct zorro_dev *z,
         int error;
         struct a2091_scsiregs *regs;
         wd33c93_regs wdregs;
-        struct WD33C93_hostdata *hdata;
+        struct a2091_hostdata *hdata;
 
         if (!request_mem_region(z->resource.start, 256, "wd33c93"))
                 return -EBUSY;
 
         instance = scsi_host_alloc(&a2091_scsi_template,
-                                   sizeof(struct WD33C93_hostdata));
+                                   sizeof(struct a2091_hostdata));
         if (!instance) {
                 error = -ENOMEM;
                 goto fail_alloc;
         }
 
-        instance->base = ZTWO_VADDR(z->resource.start);
         instance->irq = IRQ_AMIGA_PORTS;
         instance->unique_id = z->slotaddr;
 
-        regs = (struct a2091_scsiregs *)(instance->base);
+        regs = (struct a2091_scsiregs *)ZTWO_VADDR(z->resource.start);
         regs->DAWR = DAWR_A2091;
 
         wdregs.SASR = &regs->SASR;
         wdregs.SCMD = &regs->SCMD;
 
         hdata = shost_priv(instance);
-        hdata->no_sync = 0xff;
-        hdata->fast = 0;
-        hdata->dma_mode = CTRL_DMA;
+        hdata->wh.no_sync = 0xff;
+        hdata->wh.fast = 0;
+        hdata->wh.dma_mode = CTRL_DMA;
+        hdata->regs = regs;
 
         wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_8_10);
         error = request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED,
@@ -234,9 +241,9 @@ fail_alloc:
 static void __devexit a2091_remove(struct zorro_dev *z)
 {
         struct Scsi_Host *instance = zorro_get_drvdata(z);
-        struct a2091_scsiregs *regs = (struct a2091_scsiregs *)(instance->base);
+        struct a2091_hostdata *hdata = shost_priv(instance);
 
-        regs->CNTR = 0;
+        hdata->regs->CNTR = 0;
         scsi_remove_host(instance);
         free_irq(IRQ_AMIGA_PORTS, instance);
         scsi_host_put(instance);