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X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: c33c9f88-1eb7-4099-9700-16013fd9e8aa X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 9azI3k6Or2o2KD0fiIHyPWG1WJYRZIuSACld5Va8GBEcERkgJrMCTUoCOk4++dmP8MFc0YGlF3/HQSBdZfB9dw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB7950 X-Proofpoint-ORIG-GUID: lYUxVgDzwscraqvXiDJNNkbgMeermTJ2 X-Authority-Analysis: v=2.4 cv=NPuH+F6g c=1 sm=1 tr=0 ts=67354c25 cx=c_pps a=t4gDRyhI9k+KZ5gXRQysFQ==:117 a=t4gDRyhI9k+KZ5gXRQysFQ==:17 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=8nJEP1OIZ-IA:10 a=VlfZXiiP6vEA:10 a=nEwiWwFL_bsA:10 a=qPHU084jO2kA:10 a=jIQo8A4GAAAA:8 a=9dXq-v3q9CYHDsQcqtMA:9 a=wPNLvfGTeEIA:10 a=Lf5xNeLK5dgiOs8hzIjU:22 X-Proofpoint-GUID: lYUxVgDzwscraqvXiDJNNkbgMeermTJ2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_active_cloned_notspam policy=outbound_active_cloned score=0 clxscore=1015 mlxscore=0 malwarescore=0 adultscore=0 mlxlogscore=999 spamscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 impostorscore=0 bulkscore=0 phishscore=0 classifier=spam authscore=0 adjust=0 reason=mlx scancount=1 engine=8.19.0-2409260000 definitions=main-2411140005 The current logic in dwc3 driver is tracking req->num_queued_sgs and req->sg. But they can be checked base on the num_pending_sgs and num_trbs. They are redundant and can complicate the SG logic. Let's remove them. Signed-off-by: Thinh Nguyen --- drivers/usb/dwc3/core.h | 3 --- drivers/usb/dwc3/gadget.c | 42 +++++++-------------------------------- 2 files changed, 7 insertions(+), 38 deletions(-) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 2dccd8fa7efd..aa09ccbf34a5 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -941,10 +941,8 @@ struct dwc3_hwparams { * @request: struct usb_request to be transferred * @list: a list_head used for request queueing * @dep: struct dwc3_ep owning this request - * @sg: pointer to first incomplete sg * @start_sg: pointer to the sg which should be queued next * @num_pending_sgs: counter to pending sgs - * @num_queued_sgs: counter to the number of sgs which already got queued * @remaining: amount of data remaining * @status: internal dwc3 request status tracking * @epnum: endpoint number to which this request refers @@ -964,7 +962,6 @@ struct dwc3_request { struct scatterlist *start_sg; unsigned int num_pending_sgs; - unsigned int num_queued_sgs; unsigned int remaining; unsigned int status; diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 3a5a0d8be33c..687bb8cc4114 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1544,7 +1544,6 @@ static int dwc3_prepare_trbs_sg(struct dwc3_ep *dep, if (!last_sg) req->start_sg = sg_next(s); - req->num_queued_sgs++; req->num_pending_sgs--; /* @@ -1625,9 +1624,7 @@ static int dwc3_prepare_trbs(struct dwc3_ep *dep) if (ret) return ret; - req->sg = req->request.sg; - req->start_sg = req->sg; - req->num_queued_sgs = 0; + req->start_sg = req->request.sg; req->num_pending_sgs = req->request.num_mapped_sgs; if (req->num_pending_sgs > 0) { @@ -3472,20 +3469,16 @@ static int dwc3_gadget_ep_reclaim_trb_sg(struct dwc3_ep *dep, int status) { struct dwc3_trb *trb; - struct scatterlist *sg = req->sg; - struct scatterlist *s; - unsigned int num_queued = req->num_queued_sgs; + unsigned int num_completed_trbs = req->num_trbs; unsigned int i; int ret = 0; - for_each_sg(sg, s, num_queued, i) { + for (i = 0; i < num_completed_trbs; i++) { trb = &dep->trb_pool[dep->trb_dequeue]; - req->sg = sg_next(s); - req->num_queued_sgs--; - ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req, - trb, event, status, true); + trb, event, status, + !!(trb->ctrl & DWC3_TRB_CTRL_CHN)); if (ret) break; } @@ -3493,19 +3486,9 @@ static int dwc3_gadget_ep_reclaim_trb_sg(struct dwc3_ep *dep, return ret; } -static int dwc3_gadget_ep_reclaim_trb_linear(struct dwc3_ep *dep, - struct dwc3_request *req, const struct dwc3_event_depevt *event, - int status) -{ - struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue]; - - return dwc3_gadget_ep_reclaim_completed_trb(dep, req, trb, - event, status, false); -} - static bool dwc3_gadget_ep_request_completed(struct dwc3_request *req) { - return req->num_pending_sgs == 0 && req->num_queued_sgs == 0; + return req->num_pending_sgs == 0 && req->num_trbs == 0; } static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep, @@ -3515,24 +3498,13 @@ static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep, int request_status; int ret; - if (req->request.num_mapped_sgs) - ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event, - status); - else - ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, - status); + ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event, status); req->request.actual = req->request.length - req->remaining; if (!dwc3_gadget_ep_request_completed(req)) goto out; - if (req->needs_extra_trb) { - ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, - status); - req->needs_extra_trb = false; - } - /* * The event status only reflects the status of the TRB with IOC set. * For the requests that don't set interrupt on completion, the driver