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[92.40.248.24]) by smtp.gmail.com with ESMTPSA id n17sm8900015wmc.5.2018.12.05.11.14.32 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 05 Dec 2018 11:14:32 -0800 (PST) From: Malcolm Priestley Subject: [PATCH v2 2/2] media: lmedm04: Move interrupt buffer to priv buffer. To: Linux Media Mailing List Message-ID: <3c964ad4-cefd-bed0-1317-9ae3d3450b47@gmail.com> Date: Wed, 5 Dec 2018 19:14:31 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 Content-Language: en-US Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Interrupt is always present throughout life time of driver and there is no dma element move this buffer to private area of driver. Signed-off-by: Malcolm Priestley --- v2 removed the need for DMA transfer flags as per Sean drivers/media/usb/dvb-usb-v2/lmedm04.c | 28 +++++++++----------------- 1 file changed, 9 insertions(+), 19 deletions(-) diff --git a/drivers/media/usb/dvb-usb-v2/lmedm04.c b/drivers/media/usb/dvb-usb-v2/lmedm04.c index cba782261a6f..602013cf3e69 100644 --- a/drivers/media/usb/dvb-usb-v2/lmedm04.c +++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c @@ -134,7 +134,7 @@ struct lme2510_state { u8 stream_on; u8 pid_size; u8 pid_off; - void *buffer; + u8 int_buffer[128]; struct urb *lme_urb; u8 usb_buffer[64]; /* Frontend original calls */ @@ -388,20 +388,14 @@ static int lme2510_int_read(struct dvb_usb_adapter *adap) if (lme_int->lme_urb == NULL) return -ENOMEM; - lme_int->buffer = usb_alloc_coherent(d->udev, 128, GFP_ATOMIC, - &lme_int->lme_urb->transfer_dma); - - if (lme_int->buffer == NULL) - return -ENOMEM; - usb_fill_int_urb(lme_int->lme_urb, - d->udev, - usb_rcvintpipe(d->udev, 0xa), - lme_int->buffer, - 128, - lme2510_int_response, - adap, - 8); + d->udev, + usb_rcvintpipe(d->udev, 0xa), + lme_int->int_buffer, + sizeof(lme_int->int_buffer), + lme2510_int_response, + adap, + 8); /* Quirk of pipe reporting PIPE_BULK but behaves as interrupt */ ep = usb_pipe_endpoint(d->udev, lme_int->lme_urb->pipe); @@ -409,8 +403,6 @@ static int lme2510_int_read(struct dvb_usb_adapter *adap) if (usb_endpoint_type(&ep->desc) == USB_ENDPOINT_XFER_BULK) lme_int->lme_urb->pipe = usb_rcvbulkpipe(d->udev, 0xa), - lme_int->lme_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - usb_submit_urb(lme_int->lme_urb, GFP_ATOMIC); info("INT Interrupt Service Started"); @@ -1225,10 +1217,8 @@ static void lme2510_exit(struct dvb_usb_device *d) lme2510_kill_urb(&adap->stream); } - if (st->lme_urb != NULL) { + if (st->lme_urb) { usb_kill_urb(st->lme_urb); - usb_free_coherent(d->udev, 128, st->buffer, - st->lme_urb->transfer_dma); usb_free_urb(st->lme_urb); info("Interrupt Service Stopped"); }