On Thu, 2011-03-24 at 11:20 +0800, Andrew Buckeridge wrote: > Package: linux-image-2.6.32-5-powerpc > Version: 2.6.32-31 > > After upgrading to squeeze userland I now have this Oops. Please test these patches, following the directions at <http://kernel-handbook.alioth.debian.org/ch-common-tasks.html#s-common-official>. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
From 27928c547835ec6acb9e1fa7808c45ec813193a3 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Sat, 26 Mar 2011 17:30:58 +0000
Subject: [PATCH 1/2] via-ircc: Use pci_{get,set}_drvdata() instead of static pointer variable
via-ircc still maintains its own array of device pointers in Linux 2.4
style. Worse, it always uses index 0, so it will crash if there are
multiple suitable devices in the system.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/net/irda/via-ircc.c | 82 ++++++++-----------------------------------
1 files changed, 15 insertions(+), 67 deletions(-)
diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c
index 67c0ad4..cc6faca 100644
--- a/drivers/net/irda/via-ircc.c
+++ b/drivers/net/irda/via-ircc.c
@@ -75,15 +75,9 @@ static int dongle_id = 0; /* default: probe */
/* We can't guess the type of connected dongle, user *must* supply it. */
module_param(dongle_id, int, 0);
-/* FIXME : we should not need this, because instances should be automatically
- * managed by the PCI layer. Especially that we seem to only be using the
- * first entry. Jean II */
-/* Max 4 instances for now */
-static struct via_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
-
/* Some prototypes */
-static int via_ircc_open(int i, chipio_t * info, unsigned int id);
-static int via_ircc_close(struct via_ircc_cb *self);
+static int via_ircc_open(struct pci_dev *pdev, chipio_t * info,
+ unsigned int id);
static int via_ircc_dma_receive(struct via_ircc_cb *self);
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
int iobase);
@@ -215,7 +209,7 @@ static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_devi
pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
pci_write_config_byte(pcidev,0x5a,0xc0);
WriteLPCReg(0x28, 0x70 );
- if (via_ircc_open(0, &info,0x3076) == 0)
+ if (via_ircc_open(pcidev, &info, 0x3076) == 0)
rc=0;
} else
rc = -ENODEV; //IR not turn on
@@ -254,7 +248,7 @@ static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_devi
info.irq=FirIRQ;
info.dma=FirDRQ1;
info.dma2=FirDRQ0;
- if (via_ircc_open(0, &info,0x3096) == 0)
+ if (via_ircc_open(pcidev, &info, 0x3096) == 0)
rc=0;
} else
rc = -ENODEV; //IR not turn on !!!!!
@@ -264,48 +258,10 @@ static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_devi
return rc;
}
-/*
- * Function via_ircc_clean ()
- *
- * Close all configured chips
- *
- */
-static void via_ircc_clean(void)
-{
- int i;
-
- IRDA_DEBUG(3, "%s()\n", __func__);
-
- for (i=0; i < ARRAY_SIZE(dev_self); i++) {
- if (dev_self[i])
- via_ircc_close(dev_self[i]);
- }
-}
-
-static void __devexit via_remove_one (struct pci_dev *pdev)
-{
- IRDA_DEBUG(3, "%s()\n", __func__);
-
- /* FIXME : This is ugly. We should use pci_get_drvdata(pdev);
- * to get our driver instance and call directly via_ircc_close().
- * See vlsi_ir for details...
- * Jean II */
- via_ircc_clean();
-
- /* FIXME : This should be in via_ircc_close(), because here we may
- * theoritically disable still configured devices :-( - Jean II */
- pci_disable_device(pdev);
-}
-
static void __exit via_ircc_cleanup(void)
{
IRDA_DEBUG(3, "%s()\n", __func__);
- /* FIXME : This should be redundant, as pci_unregister_driver()
- * should call via_remove_one() on each device.
- * Jean II */
- via_ircc_clean();
-
/* Cleanup all instances of the driver */
pci_unregister_driver (&via_driver);
}
@@ -324,12 +280,13 @@ static const struct net_device_ops via_ircc_fir_ops = {
};
/*
- * Function via_ircc_open (iobase, irq)
+ * Function via_ircc_open(pdev, iobase, irq)
*
* Open driver instance
*
*/
-static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
+static __devinit int via_ircc_open(struct pci_dev *pdev, chipio_t * info,
+ unsigned int id)
{
struct net_device *dev;
struct via_ircc_cb *self;
@@ -337,9 +294,6 @@ static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
IRDA_DEBUG(3, "%s()\n", __func__);
- if (i >= ARRAY_SIZE(dev_self))
- return -ENOMEM;
-
/* Allocate new instance of the driver */
dev = alloc_irdadev(sizeof(struct via_ircc_cb));
if (dev == NULL)
@@ -349,13 +303,8 @@ static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
self->netdev = dev;
spin_lock_init(&self->lock);
- /* FIXME : We should store our driver instance in the PCI layer,
- * using pci_set_drvdata(), not in this array.
- * See vlsi_ir for details... - Jean II */
- /* FIXME : 'i' is always 0 (see via_init_one()) :-( - Jean II */
- /* Need to store self somewhere */
- dev_self[i] = self;
- self->index = i;
+ pci_set_drvdata(pdev, self);
+
/* Initialize Resource */
self->io.cfg_base = info->cfg_base;
self->io.fir_base = info->fir_base;
@@ -463,25 +412,24 @@ static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
err_out2:
release_region(self->io.fir_base, self->io.fir_ext);
err_out1:
+ pci_set_drvdata(pdev, NULL);
free_netdev(dev);
- dev_self[i] = NULL;
return err;
}
/*
- * Function via_ircc_close (self)
+ * Function via_remove_one(pdev)
*
* Close driver instance
*
*/
-static int via_ircc_close(struct via_ircc_cb *self)
+static void __devexit via_remove_one(struct pci_dev *pdev)
{
+ struct via_ircc_cb *self = pci_get_drvdata(pdev);
int iobase;
IRDA_DEBUG(3, "%s()\n", __func__);
- IRDA_ASSERT(self != NULL, return -1;);
-
iobase = self->io.fir_base;
ResetChip(iobase, 5); //hardware reset.
@@ -498,11 +446,11 @@ static int via_ircc_close(struct via_ircc_cb *self)
if (self->rx_buff.head)
dma_free_coherent(NULL, self->rx_buff.truesize,
self->rx_buff.head, self->rx_buff_dma);
- dev_self[self->index] = NULL;
+ pci_set_drvdata(pdev, NULL);
free_netdev(self->netdev);
- return 0;
+ pci_disable_device(pdev);
}
/*
--
1.7.4.1
From 0edcdd33fcc5b564f45ef433679a97338d195b6a Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Sat, 26 Mar 2011 17:36:00 +0000
Subject: [PATCH 2/2] via-ircc: Pass PCI device pointer to dma_{alloc,free}_coherent()
via-ircc has been passing a NULL pointer to DMA allocation functions,
which is completely invalid and results in a BUG on PowerPC. Now
that we always have the device pointer available, pass it in.
Reference: http://bugs.debian.org/619450
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/net/irda/via-ircc.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/net/irda/via-ircc.c b/drivers/net/irda/via-ircc.c
index cc6faca..186cd28 100644
--- a/drivers/net/irda/via-ircc.c
+++ b/drivers/net/irda/via-ircc.c
@@ -363,7 +363,7 @@ static __devinit int via_ircc_open(struct pci_dev *pdev, chipio_t * info,
/* Allocate memory if needed */
self->rx_buff.head =
- dma_alloc_coherent(NULL, self->rx_buff.truesize,
+ dma_alloc_coherent(&pdev->dev, self->rx_buff.truesize,
&self->rx_buff_dma, GFP_KERNEL);
if (self->rx_buff.head == NULL) {
err = -ENOMEM;
@@ -372,7 +372,7 @@ static __devinit int via_ircc_open(struct pci_dev *pdev, chipio_t * info,
memset(self->rx_buff.head, 0, self->rx_buff.truesize);
self->tx_buff.head =
- dma_alloc_coherent(NULL, self->tx_buff.truesize,
+ dma_alloc_coherent(&pdev->dev, self->tx_buff.truesize,
&self->tx_buff_dma, GFP_KERNEL);
if (self->tx_buff.head == NULL) {
err = -ENOMEM;
@@ -404,10 +404,10 @@ static __devinit int via_ircc_open(struct pci_dev *pdev, chipio_t * info,
via_hw_init(self);
return 0;
err_out4:
- dma_free_coherent(NULL, self->tx_buff.truesize,
+ dma_free_coherent(&pdev->dev, self->tx_buff.truesize,
self->tx_buff.head, self->tx_buff_dma);
err_out3:
- dma_free_coherent(NULL, self->rx_buff.truesize,
+ dma_free_coherent(&pdev->dev, self->rx_buff.truesize,
self->rx_buff.head, self->rx_buff_dma);
err_out2:
release_region(self->io.fir_base, self->io.fir_ext);
@@ -441,10 +441,10 @@ static void __devexit via_remove_one(struct pci_dev *pdev)
__func__, self->io.fir_base);
release_region(self->io.fir_base, self->io.fir_ext);
if (self->tx_buff.head)
- dma_free_coherent(NULL, self->tx_buff.truesize,
+ dma_free_coherent(&pdev->dev, self->tx_buff.truesize,
self->tx_buff.head, self->tx_buff_dma);
if (self->rx_buff.head)
- dma_free_coherent(NULL, self->rx_buff.truesize,
+ dma_free_coherent(&pdev->dev, self->rx_buff.truesize,
self->rx_buff.head, self->rx_buff_dma);
pci_set_drvdata(pdev, NULL);
--
1.7.4.1
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