diff mbox series

[v3,11/28] usb: gadget: f_tcm: Don't set static stream_id

Message ID d57b7dfd228199cef811206b1b83ec649f742752.1733876548.git.Thinh.Nguyen@synopsys.com (mailing list archive)
State New
Headers show
Series [v3,01/28] usb: gadget: f_tcm: Don't free command immediately | expand

Commit Message

Thinh Nguyen Dec. 11, 2024, 12:32 a.m. UTC 
Host can assign stream ID value greater than number of streams
allocated. The tcm function needs to keep track of which stream is
available to assign the stream ID. This patch doesn't track that, but at
least it makes sure that there's no Oops if the host send tag with a
value greater than the number of supported streams.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
---
 drivers/usb/gadget/function/f_tcm.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c
index a908bbd04b09..a594ed1359fc 100644
--- a/drivers/usb/gadget/function/f_tcm.c
+++ b/drivers/usb/gadget/function/f_tcm.c
@@ -511,6 +511,7 @@  static int uasp_prepare_r_request(struct usbg_cmd *cmd)
 	}
 
 	stream->req_in->is_last = 1;
+	stream->req_in->stream_id = cmd->tag;
 	stream->req_in->complete = uasp_status_data_cmpl;
 	stream->req_in->length = se_cmd->data_length;
 	stream->req_in->context = cmd;
@@ -535,6 +536,7 @@  static void uasp_prepare_status(struct usbg_cmd *cmd)
 	iu->len = cpu_to_be16(se_cmd->scsi_sense_length);
 	iu->status = se_cmd->scsi_status;
 	stream->req_status->is_last = 1;
+	stream->req_status->stream_id = cmd->tag;
 	stream->req_status->context = cmd;
 	stream->req_status->length = se_cmd->scsi_sense_length + 16;
 	stream->req_status->buf = iu;
@@ -765,19 +767,6 @@  static int uasp_alloc_cmd(struct f_uas *fu)
 	return -ENOMEM;
 }
 
-static void uasp_setup_stream_res(struct f_uas *fu, int max_streams)
-{
-	int i;
-
-	for (i = 0; i < max_streams; i++) {
-		struct uas_stream *s = &fu->stream[i];
-
-		s->req_in->stream_id = i + 1;
-		s->req_out->stream_id = i + 1;
-		s->req_status->stream_id = i + 1;
-	}
-}
-
 static int uasp_prepare_reqs(struct f_uas *fu)
 {
 	int ret;
@@ -798,7 +787,6 @@  static int uasp_prepare_reqs(struct f_uas *fu)
 	ret = uasp_alloc_cmd(fu);
 	if (ret)
 		goto err_free_stream;
-	uasp_setup_stream_res(fu, max_streams);
 
 	ret = usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC);
 	if (ret)
@@ -975,6 +963,7 @@  static int usbg_prepare_w_request(struct usbg_cmd *cmd, struct usb_request *req)
 	}
 
 	req->is_last = 1;
+	req->stream_id = cmd->tag;
 	req->complete = usbg_data_write_cmpl;
 	req->length = se_cmd->data_length;
 	req->context = cmd;