Re: [RFC PATCH v2 6/6] USB: forbid memory allocation with I/O duringbus reset
From: Ming Lei
Date: Tue Oct 23 2012 - 04:44:32 EST
On Mon, Oct 22, 2012 at 10:37 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> On Mon, 22 Oct 2012, Ming Lei wrote:
>> + /*
>> + * Don't allocate memory with GFP_KERNEL in current
>> + * context to avoid possible deadlock if usb mass
>> + * storage interface or usbnet interface(iSCSI case)
>> + * is included in current configuration. The easiest
>> + * approach is to do it for all devices.
>> + */
>> + memalloc_noio_save(noio_flag);
> Why not check dev->power.memalloc_noio_resume here too?
Yes, we can use the flag here too even though it is introduced
for rutime_resume case.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/