Re: [Pcihpd-discuss] [PATCH] correct pciehp init recovery

[Jan Beulich]

>>> Kristen Accardi <kristen.c.accardi@xxxxxxxxx> 28.04.06 19:38 >>>
>On Fri, 2006-04-28 at 16:59 +0200, Jan Beulich wrote:
>> Clean up the recovery path from errors during pcie_init().
>> 
>It's possible that this driver never actually requested an irq if was in
>poll mode.  Then you will call free_irq, when what you really want to do
>is kill the timer that may have been started. 

Thanks for pointing this out, here's the updated patch:

Clean up the recovery path from errors during pcie_init().

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- /home/jbeulich/tmp/linux-2.6.17-rc3/drivers/pci/hotplug/pciehp_hpc.c	2006-04-27 17:49:41.000000000 +0200
+++ 2.6.17-rc3-pciehp-init-recovery/drivers/pci/hotplug/pciehp_hpc.c	2006-04-28 09:20:55.000000000 +0200
@@ -1474,7 +1474,7 @@ int pcie_init(struct controller * ctrl, 
 	rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
-		goto abort_free_ctlr;
+		goto abort_free_irq;
 	}
 
 	intr_enable = intr_enable | PRSN_DETECT_ENABLE;
@@ -1500,19 +1500,19 @@ int pcie_init(struct controller * ctrl, 
 	rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
-		goto abort_free_ctlr;
+		goto abort_free_irq;
 	}
 	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
-		goto abort_free_ctlr;
+		goto abort_disable_intr;
 	}
 	
 	temp_word =  0x1F; /* Clear all events */
 	rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
-		goto abort_free_ctlr;
+		goto abort_disable_intr;
 	}
 	
 	if (pciehp_force) {
@@ -1521,7 +1521,7 @@ int pcie_init(struct controller * ctrl, 
 	} else {
 		rc = pciehp_get_hp_hw_control_from_firmware(ctrl->pci_dev);
 		if (rc)
-			goto abort_free_ctlr;
+			goto abort_disable_intr;
 	}
 
 	/*  Add this HPC instance into the HPC list */
@@ -1548,6 +1548,21 @@ int pcie_init(struct controller * ctrl, 
 	return 0;
 
 	/* We end up here for the many possible ways to fail this API.  */
+abort_disable_intr:
+	rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
+	if (!rc) {
+		temp_word &= ~(intr_enable | HP_INTR_ENABLE);
+		rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
+	}
+	if (rc)
+		err("%s : disabling interrupts failed\n", __FUNCTION__);
+
+abort_free_irq:
+	if (pciehp_poll_mode)
+		del_timer_sync(&php_ctlr->int_poll_timer);
+	else
+		free_irq(php_ctlr->irq, ctrl);
+
 abort_free_ctlr:
 	pcie_cap_base = saved_cap_base;
 	kfree(php_ctlr);


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