On Mon, Jun 04, 2012 at 01:30:24PM +0200, Christoph Fritz wrote: > Hi, > > On Mon, 2012-05-21 at 22:04 +0300, Felipe Balbi wrote: > > On Mon, May 21, 2012 at 08:57:22AM +0200, Christoph Fritz wrote: > > > USB controller may access a wrong address for the dTD (endpoint transfer > > > descriptor) and then hang. This happens a lot when doing tests with > > > g_ether module and iperf, a tool for measuring maximum TCP and UDP > > > bandwidth. > > > > > > This hardware bug is explained in detail by errata number 2858 for i.MX23: > > > http://cache.freescale.com/files/dsp/doc/errata/IMX23CE.pdf > > > > > > All (?) SOCs with an IP from chipidea suffer from this problem. > > > mv_udc_core fixes this bug by commit daec765. There still may be > > > unfixed drivers. > > > > > > Signed-off-by: Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx> > > > Signed-off-by: Christian Hemp <c.hemp@xxxxxxxxx> > > > --- > > > drivers/usb/gadget/fsl_udc_core.c | 15 ++++++++++++++- > > > 1 files changed, 14 insertions(+), 1 deletions(-) > > > > > > diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c > > > index 55abfb6..72f2139 100644 > > > --- a/drivers/usb/gadget/fsl_udc_core.c > > > +++ b/drivers/usb/gadget/fsl_udc_core.c > > > @@ -65,6 +65,8 @@ static struct usb_sys_interface *usb_sys_regs; > > > /* it is initialized in probe() */ > > > static struct fsl_udc *udc_controller = NULL; > > > > > > +static struct ep_td_struct *last_free_td; > > > > I don't want to see global variables anymore. In fact, please convert > > this to the new udc_start()/udc_stop() calls and use the generic > > map/unmap routines. > > > > That'll help you get rid of a bunch of useless code on the driver. After > > that you should remove all <asm/*> header includes and drop the ARCH > > dependency. > > > > You can also drop the big-/little-endian helpers as you can make use of > > generic writel()/readl() routines. > > > > Please make sure these series comes in with enough time to reach v3.6 > > merge window in about 3 months. > > > > You can put this fix together on that series after you drop the global. > > Before I came to do the proposed changes, I stumbled upon this: > > In file included from drivers/usb/gadget/fsl_udc_core.c:49: > drivers/usb/gadget/fsl_usb2_udc.h: In function ‘get_qh_by_ep’: > drivers/usb/gadget/fsl_usb2_udc.h:585: error: ‘struct fsl_ep’ has no member named ‘desc’ > drivers/usb/gadget/fsl_udc_core.c: In function ‘done’: > drivers/usb/gadget/fsl_udc_core.c:187: error: ‘struct fsl_ep’ has no member named ‘desc’ > drivers/usb/gadget/fsl_udc_core.c:187: error: ‘struct fsl_ep’ has no member named ‘desc’ > <snip> > > my proposed regression patch: > --- > From: Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx> > Date: Mon, 4 Jun 2012 12:58:21 +0200 > Subject: [PATCH] usb: gadget: regression fix - useage of usb_ep > > This patch removes redundant pointer to struct usb_endpoint_descriptor which > were missed in commit 79149b8: > > usb: gadget: Update fsl_udc_core to use usb_endpoint_descriptor inside the > struct usb_ep > > Signed-off-by: Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx> > --- > drivers/usb/gadget/fsl_udc_core.c | 2 +- > drivers/usb/gadget/fsl_usb2_udc.h | 4 ++-- > 2 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c > index 2831685..678ec4d 100644 > --- a/drivers/usb/gadget/fsl_udc_core.c > +++ b/drivers/usb/gadget/fsl_udc_core.c > @@ -2575,7 +2575,7 @@ static int __init fsl_udc_probe(struct platform_device *pdev) > /* for ep0: the desc defined here; > * for other eps, gadget layer called ep_enable with defined desc > */ > - udc_controller->eps[0].desc = &fsl_ep0_desc; > + udc_controller->eps[0].ep.desc = &fsl_ep0_desc; > udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD; > > /* setup the udc->eps[] for non-control endpoints and link > diff --git a/drivers/usb/gadget/fsl_usb2_udc.h b/drivers/usb/gadget/fsl_usb2_udc.h > index 5cd7b7e..f61a967 100644 > --- a/drivers/usb/gadget/fsl_usb2_udc.h > +++ b/drivers/usb/gadget/fsl_usb2_udc.h > @@ -568,10 +568,10 @@ static void dump_msg(const char *label, const u8 * buf, unsigned int length) > /* > * ### internal used help routines. > */ > -#define ep_index(EP) ((EP)->desc->bEndpointAddress&0xF) > +#define ep_index(EP) ((EP)->ep.desc->bEndpointAddress&0xF) > #define ep_maxpacket(EP) ((EP)->ep.maxpacket) > #define ep_is_in(EP) ( (ep_index(EP) == 0) ? (EP->udc->ep0_dir == \ > - USB_DIR_IN ):((EP)->desc->bEndpointAddress \ > + USB_DIR_IN) : ((EP)->ep.desc->bEndpointAddress \ > & USB_DIR_IN)==USB_DIR_IN) > #define get_ep_by_pipe(udc, pipe) ((pipe == 1)? &udc->eps[0]: \ > &udc->eps[pipe]) > -- > 1.7.2.5 Please send as a proper patch so I can apply. -- balbi
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