On Wed, 2007-10-24 at 15:33 +0400, Valentine Barshak wrote:
> On systems with noncoherent cache, allocating dma buffers
> on the stack for USB IN transfers causes kernel crash,
> because usb map_urb_for_dma() code calls dma_map_single(),
> that invalidates data cache for DMA_FROM_DEVICE transfer d
On systems with noncoherent cache, allocating dma buffers
on the stack for USB IN transfers causes kernel crash,
because usb map_urb_for_dma() code calls dma_map_single(),
that invalidates data cache for DMA_FROM_DEVICE transfer direction
and causes stack data loss if transfer size is less than cac
Sorry,
CC'ed Dave Brownell instead of Dave Hollis :)
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On systems with noncoherent cache, allocating dma buffers
on the stack for USB IN transfers causes kernel crash,
because usb map_urb_for_dma() code calls dma_map_single(),
that invalidates data cache for DMA_FROM_DEVICE transfer direction
and causes stack data loss if transfer size is less than cac
> From [EMAIL PROTECTED] Tue Oct 23 10:51:00 2007
> Date: Tue, 23 Oct 2007 21:40:18 +0400
> From: Valentine Barshak <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Cc: netdev@vger.kernel.org
> Subject: [linux-usb-devel] [PATCH] USB: net: Fix asix read transfer buffer
>
On systems with noncoherent cache, allocating dma buffers
on the stack for USB IN transfers causes kernel crash,
because usb map_urb_for_dma() code calls dma_map_single(),
that invalidates data cache for DMA_FROM_DEVICE transfer direction
and causes stack data loss if transfer size is less than cac
Ingo Oeser wrote:
Valentine Barshak schrieb:
Oliver Neukum wrote:
Am Montag 22 Oktober 2007 schrieb Valentine Barshak:
static int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
{
struct usbnet *dev = netdev_priv(netdev);
+ void *buf;
u16 res;
m
Valentine Barshak schrieb:
> Oliver Neukum wrote:
> > Am Montag 22 Oktober 2007 schrieb Valentine Barshak:
> >> static int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
> >> {
> >> struct usbnet *dev = netdev_priv(netdev);
> >> + void *buf;
> >> u16 res;
> >
Oliver Neukum wrote:
Am Montag 22 Oktober 2007 schrieb Valentine Barshak:
static int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
{
struct usbnet *dev = netdev_priv(netdev);
+ void *buf;
u16 res;
mutex_lock(&dev->phy_mutex);
asix_set_s
Am Montag 22 Oktober 2007 schrieb Valentine Barshak:
> static int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
> {
> struct usbnet *dev = netdev_priv(netdev);
> + void *buf;
> u16 res;
>
> mutex_lock(&dev->phy_mutex);
> asix_set_sw_mii(dev
On systems with noncoherent cache, allocating dma buffers
on the stack for USB IN transfers causes kernel crash,
because usb map_urb_for_dma() code calls dma_map_single(),
that invalidates data cache for DMA_FROM_DEVICE transfer direction
and causes stack data loss if transfer size is less than cac
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