lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 16 Oct 2014 10:08:50 +0200 (CEST) From: Fabian Frederick <fabf@...net.be> To: Joe Perches <joe@...ches.com>, Bjørn Mork <bjorn@...k.no> Cc: linux-wireless@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, "John W. Linville" <linville@...driver.com> Subject: Re: [PATCH 1/1 linux-next] zd1201: replace kmalloc/memset by kzalloc > On 14 October 2014 at 20:08 Bjørn Mork <bjorn@...k.no> wrote: > > > Joe Perches <joe@...ches.com> writes: > > > And does this really need to be alloc'd? > > Yes, it does. It is used as a transfer_buffer in usb_fill_bulk_urb() and > must be "suitable for DMA". From include/linux/usb.h: > > /** > * struct urb - USB Request Block > .. > * @transfer_buffer: This identifies the buffer to (or from) which the I/O > * request will be performed unless URB_NO_TRANSFER_DMA_MAP is set > * (however, do not leave garbage in transfer_buffer even then). > * This buffer must be suitable for DMA; allocate it with > * kmalloc() or equivalent. For transfers to "in" endpoints, contents > * of this buffer will be modified. This buffer is used for the data > * stage of control transfers. > > Adding a structure would be a nice design update indeed but this would require some testing...Separate patch maybe ? Fabian > > Bjørn -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists