[PATCH] drivers/scsi/inia100.c cleanup (241p9)

Rasmus Andersen
2001-01-22T23:44:47Z

Hi.

The following patch makes drivers/scsi/inia100.c refrain from
calling panic(), makes it check the return code of request_region
and makes it release a lot of resources on error.

It applies cleanly against ac10 and 241p9.

Comments?

--- linux-ac10-clean/drivers/scsi/inia100.c Sun Nov 12 04:01:11 2000
+++ linux-ac10/drivers/scsi/inia100.c Sun Jan 21 23:57:30 2001
@@ -119,7 +119,6 @@
static void inia100_intr6(int irq, void *dev_id, struct pt_regs *);
static void inia100_intr7(int irq, void *dev_id, struct pt_regs *);

-static void inia100_panic(char *msg);
void inia100SCBPost(BYTE * pHcb, BYTE * pScb);

/* ---- EXTERNAL VARIABLES ---- */
@@ -192,8 +191,10 @@
*****************************************************************************/
void inia100_setup(char *str, int *ints)
{
- if (setup_called)
- inia100_panic("inia100: inia100_setup called twice.\n");
+ if (setup_called) {
+ printk(KERN_ERR "inia100: inia100_setup called twice.\n");
+ return;
+ }

setup_called = ints[0];
setup_str = str;
@@ -204,8 +205,8 @@
Description : This function will scan PCI bus to get all Orchid card
Input : None.
Output : None.
- Return : SUCCESSFUL - Successful scan
- ohterwise - No drives founded
+ Return : n > 0 - n adapters found
+ 0 - No drives found
*****************************************************************************/
int orc_ReturnNumberOfAdapters(void)
{
@@ -261,9 +262,9 @@
bPCIBusNum = pdev->bus->number;
bPCIDeviceNum = pdev->devfn;
dRegValue = pci_resource_start(pdev, 0);
- if (dRegValue == -1) { /* Check return code */
+ if (dRegValue == NULL) { /* Check return code */
printk("\n\rinia100: orchid read configuration error.\n");
- return (0); /* Read configuration space error */
+ return (iAdapters); /* Read configuration space error */
}

/* <02> read from base address + 0x50 offset to get the wBIOS balue. */
@@ -281,10 +282,6 @@
base = wBASE & PAGE_MASK;
page_offset = wBASE - base;

- /*
- * replace the next line with this one if you are using 2.1.x:
- * temp_p->maddr = ioremap(base, page_offset + 256);
- */
wBASE = ioremap(base, page_offset + 256);
if (wBASE) {
wBASE += page_offset;
@@ -314,6 +311,7 @@
struct Scsi_Host *hreg;
U32 sz;
U32 i; /* 01/14/98 */
+ U32 n;
int ok = 0, iAdapters;
ULONG dBiosAdr;
BYTE *pbBiosAdr;
@@ -354,7 +352,7 @@
sz = orc_num_scb * sizeof(ORC_SCB);
if ((pHCB->HCS_virScbArray = (PVOID) kmalloc(sz, GFP_ATOMIC | GFP_DMA)) == NULL) {
printk("inia100: SCB memory allocation error\n");
- return (0);
+ goto err_out;
}
memset((unsigned char *) pHCB->HCS_virScbArray, 0, sz);
pHCB->HCS_physScbArray = (U32) VIRT_TO_BUS(pHCB->HCS_virScbArray);
@@ -363,8 +361,7 @@
sz = orc_num_scb * sizeof(ESCB);
if ((pHCB->HCS_virEscbArray = (PVOID) kmalloc(sz, GFP_ATOMIC | GFP_DMA)) == NULL) {
printk("inia100: ESCB memory allocation error\n");
- /* ?? does pHCB->HCS_virtScbArray leak ??*/
- return (0);
+ goto err_kfree;
}
memset((unsigned char *) pHCB->HCS_virEscbArray, 0, sz);
pHCB->HCS_physEscbArray = (U32) VIRT_TO_BUS(pHCB->HCS_virEscbArray);
@@ -378,15 +375,14 @@

if (init_orchid(pHCB)) { /* Initial orchid chip */
printk("inia100: initial orchid fail!!\n");
- return (0);
+ goto err_kfreeII;
}
- request_region(pHCB->HCS_Base, 256, "inia100"); /* Register */
+ if (!request_region(pHCB->HCS_Base, 256, "inia100")) /* Register */
+ goto err_kfreeII;

hreg = scsi_register(tpnt, sizeof(ORC_HCS));
- if (hreg == NULL) {
- release_region(pHCB->HCS_Base, 256); /* Register */
- return 0;
- }
+ if (hreg == NULL)
+ goto err_release;
hreg->io_port = pHCB->HCS_Base;
hreg->n_io_port = 0xff;
hreg->can_queue = orc_num_scb; /* 03/05/98 */
@@ -436,8 +432,8 @@
ok = request_irq(pHCB->HCS_Intr, inia100_intr7, SA_INTERRUPT | SA_SHIRQ, "inia100", hreg);
break;
default:
- inia100_panic("inia100: Too many host adapters\n");
- break;
+ printk(KERN_WARNING"inia100: Too many host adapters\n");
+ goto err_unregister;
}

if (ok < 0) {
@@ -453,13 +449,34 @@
printk(" Contact author.\n");
}
}
- inia100_panic("inia100: driver needs an IRQ.\n");
+ goto err_unregister;
}
}

tpnt->this_id = -1;
tpnt->can_queue = 1;
return 1;
+
+ err_unregister:
+ scsi_unregister(hreg);
+ err_release:
+ release_region(pHCB->HCS_Base, 256);
+ err_kfreeII:
+ kfree(pHCB->HCS_virtEscbArray);
+ err_kfree:
+ kfree(pHCB->HCS_virtScbArray);
+ err_out:
+#ifdef MMAPIO
+ for(n=i; n<orc_num_ch; n++) {
+ unsigmed long base = inia100_adpt[n].ADPT_BASE & PAGE_MASK;
+ unsigned long page_offset = inia100_adpt[n].ADPT_BASE - base;
+ iounmap( base, page_offset+256);
+ }
+#endif
+
+ if (i > 0)
+ return 1;
+ return 0;
}

/*****************************************************************************
@@ -775,15 +792,6 @@
static void inia100_intr7(int irqno, void *dev_id, struct pt_regs *regs)
{
subIntr(&orc_hcs[7], irqno);
-}
-
-/*
- * Dump the current driver status and panic...
- */
-static void inia100_panic(char *msg)
-{
- printk("\ninia100_panic: %s\n", msg);
- panic("inia100 panic");
}

/*

--
Regards,
Rasmus(rasmus@jaquet.dk)

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