On Fri, Feb 20 2015, Tapasweni Pathak wrote: > To avoid deadlock, do not call blocking functions with spinlocks held. > > Replace GFP_KERNEL with GFP_ATOMIC, as the latter will fail if the heap > doesn't have enough free pages but will not sleep and hence deadlock can > be avoided. > > Found by Coccinelle. > > Signed-off-by: Tapasweni Pathak <tapaswenipathak@xxxxxxxxx> > --- > Is there any other way this can be fixed as it is better to avoid GFP_ATOMIC? I think there is. A patchset will follow this reply. > drivers/usb/gadget/function/f_fs.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c > index af98b09..8a25d30 100644 > --- a/drivers/usb/gadget/function/f_fs.c > +++ b/drivers/usb/gadget/function/f_fs.c > @@ -823,7 +823,7 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data) > } > > if (io_data->aio) { > - req = usb_ep_alloc_request(ep->ep, GFP_KERNEL); > + req = usb_ep_alloc_request(ep->ep, GFP_ATOMIC); > if (unlikely(!req)) > goto error_lock; > -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +--<mpn@xxxxxxxxxx>--<xmpp:mina86@xxxxxxxxxx>--ooO--(_)--Ooo-- -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html