Fix for #12387. Cannot unload wct4xxp module on FC8

git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.4@4223 5390a7c7-147a-4af0-8ec9-7488f05a26cb

1 files changed, 14 insertions, 25 deletions

diff --git a/kernel/wct4xxp/base.c b/kernel/wct4xxp/base.c
index 5eb4fec..11277a8 100644
--- a/kernel/wct4xxp/base.c
+++ b/kernel/wct4xxp/base.c
@@ -2918,6 +2918,19 @@ ZAP_IRQ_HANDLER(t4_interrupt_gen2)
 	struct t4 *wc = dev_id;
 	unsigned int status;
 	
+	/* Check this first in case we get a spurious interrupt */
+	if (unlikely(wc->stopdma)) {
+		/* Stop DMA cleanly if requested */
+		wc->dmactrl = 0x0;
+		t4_pci_out(wc, WC_DMACTRL, 0x00000000);
+		/* Acknowledge any pending interrupts */
+		t4_pci_out(wc, WC_INTR, 0x00000000);
+		spin_lock(&wc->reglock);
+		__t4_set_timing_source(wc, 4, 0, 0);
+		spin_unlock(&wc->reglock);
+		return IRQ_RETVAL(1);
+	}
+
 	/* Make sure it's really for us */
 	status = __t4_pci_in(wc, WC_INTR);
 
@@ -3015,16 +3028,6 @@ ZAP_IRQ_HANDLER(t4_interrupt_gen2)
 		__t4_set_timing_source_auto(wc);
 	}
 
-	if (unlikely(wc->stopdma)) {
-		/* Stop DMA cleanly if requested */
-		wc->dmactrl = 0x0;
-		__t4_pci_out(wc, WC_DMACTRL, 0x00000000);
-		/* Acknowledge any pending interrupts */
-		__t4_pci_out(wc, WC_INTR, 0x00000000);
-		__t4_set_timing_source(wc, 4, 0, 0);
-		wc->stopdma = 0x0;
-	}
-
 	spin_unlock(&wc->reglock);
 
 	if (unlikely(test_bit(T4_CHECK_VPM, &wc->checkflag)))
@@ -3781,30 +3784,16 @@ static void __devexit t4_remove_one(struct pci_dev *pdev)
 			destroy_workqueue(wc->workq);
 		}
 #endif			
-#if 0
-		/* Stop any DMA */
-		__t1xxp_stop_dma(wc);
 
-		/* In case hardware is still there */
-		__t1xxp_disable_interrupts(wc);
-		
-		t1xxp_stop_stuff(wc);
-#endif
+		free_irq(pdev->irq, wc);
 
 		if (wc->membase)
 			iounmap((void *)wc->membase);
 
 		pci_release_regions(pdev);		
-#if 0
-		if (wc->memaddr)
-			release_mem_region(wc->memaddr, wc->memlen);
-#endif
 
 		/* Immediately free resources */
 		pci_free_consistent(pdev, ZT_MAX_CHUNKSIZE * 2 * 2 * 32 * 4, (void *)wc->writechunk, wc->writedma);
-#if 1
-		free_irq(pdev->irq, wc);
-#endif		
 
 		order_index[wc->order]--;