Re: [PATCH] drivers/scsi/53c7xx.c error handling and cleanup (241p9)

[Rasmus Andersen <rasmus@jaquet.dk>]

On Tue, Jan 23, 2001 at 12:27:36AM +0100, Rasmus Andersen wrote:

Hi again.

I completely messed up a large part of the patches posted yesterday due
to lack of sleep and being clinically braindead (the compile test was
run in the wrong tree...).

So I'll be posting some new patches that actually compiles (knock on
wood). I apologise for the unnecessary mails :(

(Thanks goes to Bill Wendling for bringing my attention to this one.)

--- linux-ac10-clean/drivers/scsi/53c7xx.c	Sun Nov 12 04:01:11 2000
+++ linux-ac10/drivers/scsi/53c7xx.c	Tue Jan 23 21:25:18 2001
@@ -1077,19 +1077,18 @@
     {
 	printk("scsi%d : IRQ%d not free, detaching\n",
 		host->host_no, host->irq);
-	scsi_unregister (host);
-	return -1;
+	goto err_unregister;
     } 
 
     if ((hostdata->run_tests && hostdata->run_tests(host) == -1) ||
         (hostdata->options & OPTION_DEBUG_TESTS_ONLY)) {
     	/* XXX Should disable interrupts, etc. here */
-	scsi_unregister (host);
-    	return -1;
+	goto err_free_irq;
     } else {
 	if (host->io_port)  {
 	    host->n_io_port = 128;
-	    request_region (host->io_port, host->n_io_port, "ncr53c7xx");
+	    if (!request_region (host->io_port, host->n_io_port, "ncr53c7xx"))
+		goto err_free_irq;
 	}
     }
     
@@ -1098,6 +1097,12 @@
 	hard_reset (host);
     }
     return 0;
+
+ err_free_irq:
+    free_irq(host->irq,  NCR53c7x0_intr);
+ err_unregister:
+    scsi_unregister(host);
+    return -1;
 }
 
 /* 
@@ -1206,8 +1211,11 @@
     size += 256;
 #endif
     /* Size should be < 8K, so we can fit it in two pages. */
-    if (size > 8192)
-      panic("53c7xx: hostdata > 8K");
+    if (size > 8192) {
+      printk(KERN_ERR "53c7xx: hostdata > 8K\n");
+      return -1;
+    }
+
     instance = scsi_register (tpnt, 4);
     if (!instance)
     {
@@ -3091,8 +3099,10 @@
 #endif
 /* FIXME: for ISA bus '7xx chips, we need to or GFP_DMA in here */
 
-        if (size > 4096)
-            panic ("53c7xx: allocate_cmd size > 4K");
+        if (size > 4096) {
+            printk (KERN_ERR "53c7xx: allocate_cmd size > 4K\n");
+	    return NULL;
+	}
         real = get_free_page(GFP_ATOMIC);
         if (real == 0)
         	return NULL;

-- 
        Rasmus(rasmus@jaquet.dk)

Are they taking DDT?
                -- Vice President Dan Quayle asking doctors at a Manhattan
                   AIDS clinic about their treatments of choice, 4/30/92
                   (reported in Esquire, 8/92, and NY Post early May 92)
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