[PATCH] make drivers/scsi/megaraid.c check ioremaps return code (241p9)

Rasmus Andersen (rasmus@jaquet.dk)
Tue, 23 Jan 2001 00:45:20 +0100


Hi.

The following patch makes drivers/scsi/megaraid.c check the return
code of ioremap and converts the affected code paths to forward
gotos error handling. It applies cleanly against ac10 and with a
little fuzz against 241p9.

Please comment.

--- linux-ac10-clean/drivers/scsi/megaraid.c Sat Jan 20 15:17:13 2001
+++ linux-ac10/drivers/scsi/megaraid.c Mon Jan 22 21:19:54 2001
@@ -1491,15 +1491,19 @@
megaBase = pci_resource_start (pdev, 0);
megaIrq = pdev->irq;

- if (flag & BOARD_QUARTZ)
+ if (flag & BOARD_QUARTZ) {
megaBase = (long) ioremap (megaBase, 128);
+ if (!megaBase)
+ continue;
+ }
else
megaBase += 0x10;

/* Initialize SCSI Host structure */
host = scsi_register (pHostTmpl, sizeof (mega_host_config));
if(host == NULL)
- continue;
+ goto err_unmap;
+
megaCfg = (mega_host_config *) host->hostdata;
memset (megaCfg, 0, sizeof (mega_host_config));

@@ -1528,8 +1532,7 @@
/* Request our IO Range */
if (!request_region (megaBase, 16, "megaraid")) {
printk (KERN_WARNING "megaraid: Couldn't register I/O range!" CRLFSTR);
- scsi_unregister (host);
- continue;
+ goto err_unregister;
}
}

@@ -1538,8 +1541,7 @@
"megaraid", megaCfg)) {
printk (KERN_WARNING "megaraid: Couldn't register IRQ %d!" CRLFSTR,
megaIrq);
- scsi_unregister (host);
- continue;
+ goto err_release;
}

mega_register_mailbox (megaCfg, virt_to_bus ((void *) &megaCfg->mailbox64));
@@ -1585,6 +1587,16 @@
}

numFound++;
+ continue;
+
+ err_release:
+ if (!flag = BOARD_QUARTZ)
+ release_region(megaBase, 16);
+ err_unregister:
+ scsi_unregister (host);
+ err_unmap:
+ if (flag & BOARD_QUARTZ)
+ iounmap(megaBase, 128);
}
return numFound;
}

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

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