Char: cyclades, clear interrupts before releasing

Without this patch, the driver sometimes causes "IRQXX: Nobody cares".  Fix it
by turning off irqs when releasing.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 4434c1347221..353e888295d1 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -5341,6 +5341,17 @@ static void __devexit cy_pci_release(struct pci_dev *pdev)
         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
         unsigned int i;
 
+        /* non-Z with old PLX */
+        if (cinfo->num_chips != -1 && (readb(cinfo->base_addr + CyPLX_VER) &
+                                0x0f) == PLX_9050)
+                cy_writeb(cinfo->ctl_addr + 0x4c, 0);
+        else
+#ifndef CONFIG_CYZ_INTR
+                if (cinfo->num_chips != -1)
+#endif
+                cy_writew(cinfo->ctl_addr + 0x68,
+                                readw(cinfo->ctl_addr + 0x68) & ~0x0900);
+
         pci_iounmap(pdev, cinfo->base_addr);
         if (cinfo->ctl_addr)
                 pci_iounmap(pdev, cinfo->ctl_addr);
@@ -5560,6 +5571,8 @@ static void __exit cy_cleanup_module(void)
                                 cy_pci_release(cy_card[i].pdev);
                                 continue;
                         }
+                        /* clear interrupt */
+                        cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
                         iounmap(cy_card[i].base_addr);
                         if (cy_card[i].ctl_addr)
                                 iounmap(cy_card[i].ctl_addr);