On 10.06.2022 09:18:51, Vincent MAILHOL wrote: > On Fri. 10 juin 2022 à 06:11, Rhett Aultman <rhett.aultman@xxxxxxxxxxx> wrote: > > The From tag goes at the beginning of the patch. > > From: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx> > > > When allocating URB memory with kmalloc(), drivers can simply set the > > URB_FREE_BUFFER flag in urb::transfer_flags and that way, the memory > > will be freed in the background when killing the URB (for example with > > usb_kill_anchored_urbs()). > > > > However, there are no equivalent mechanism when allocating DMA memory > > (with usb_alloc_coherent()). > > > > This patch adds a new flag: URB_FREE_COHERENT. Setting this flag will > > cause the kernel to automatically call usb_free_coherent() on the > > transfer buffer when the URB is killed, similarly to how > > URB_FREE_BUFFER triggers a call to kfree(). > > > > In order to have all the flags in numerical order, URB_DIR_IN is > > renumbered from 0x0200 to 0x0400 so that URB_FREE_COHERENT can reuse > > value 0x0200. > > > > From: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx> > > Move the From tag from here to the first line. Usually git send-email places the "From:" automatically at the beginning. > > Signed-off-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx> Rhett, please add your S-o-b here, too, as the patch went though your hands. Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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