Hi,
Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> writes:
> The Aspeed BMC SoCs support a "virtual hub" function. It provides some
> HW support for a top-level USB2 hub behind which sit 5 gadget "ports".
>
> This driver adds support for the full functionality, emulating the
> hub standard requests and exposing 5 UDC gadget drivers corresponding
> to the ports.
>
> The hub itself has HW provided dedicated EP0 and EP1 (the latter for
> hub interrupts). It also has dedicated EP0s for each function. For
> other endpoints, there's a pool of 15 "generic" endpoints that are
> shared among the ports.
>
> The driver relies on my previous patch adding a "dispose" EP op to
> handle EP allocation between ports. EPs are allocated from the shared
> pool in the UDC "match_ep" callback and assigned to the UDC instance
> (added to the gadget ep_list).
>
> When the composite driver gets unbound, the new hook will allow the UDC
> to clean things up and return those EPs to the shared pool.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> ---
doesn't compile:
In file included from ./include/linux/bitmap.h:9:0,
from ./include/linux/cpumask.h:12,
from ./arch/x86/include/asm/cpumask.h:5,
from ./arch/x86/include/asm/msr.h:11,
from ./arch/x86/include/asm/processor.h:21,
from ./arch/x86/include/asm/cpufeature.h:5,
from ./arch/x86/include/asm/thread_info.h:53,
from ./include/linux/thread_info.h:38,
from ./arch/x86/include/asm/preempt.h:7,
from ./include/linux/preempt.h:81,
from ./include/linux/spinlock.h:51,
from ./include/linux/seqlock.h:36,
from ./include/linux/time.h:6,
from ./include/linux/stat.h:19,
from ./include/linux/module.h:10,
from drivers/usb/gadget/udc/aspeed-vhub/hub.c:16:
In function ‘memcpy’,
inlined from ‘ast_vhub_rep_desc’ at drivers/usb/gadget/udc/aspeed-vhub/hub.c:276:2:
./include/linux/string.h:341:4: error: call to ‘__read_overflow2’ declared with attribute error: detected read beyond size of object passed as 2nd parameter
__read_overflow2();
^~~~~~~~~~~~~~~~~~
make[4]: *** [scripts/Makefile.build:316: drivers/usb/gadget/udc/aspeed-vhub/hub.o] Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [scripts/Makefile.build:575: drivers/usb/gadget/udc/aspeed-vhub] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [scripts/Makefile.build:575: drivers/usb/gadget/udc] Error 2
make[1]: *** [scripts/Makefile.build:575: drivers/usb/gadget] Error 2
make: *** [Makefile:1722: drivers/usb/] Error 2
--
balbi
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