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From: Wesley Cheng <wcheng@codeaurora.org>
To: balbi@kernel.org, gregkh@linuxfoundation.org, agross@kernel.org,
	bjorn.andersson@linaro.org, robh+dt@kernel.org
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	jackp@codeaurora.org, Thinh.Nguyen@synopsys.com,
	Wesley Cheng <wcheng@codeaurora.org>
Subject: [PATCH v8 2/5] usb: gadget: configfs: Check USB configuration before adding
Date: Wed, 19 May 2021 00:43:55 -0700	[thread overview]
Message-ID: <1621410238-31395-3-git-send-email-wcheng@codeaurora.org> (raw)
In-Reply-To: <1621410238-31395-1-git-send-email-wcheng@codeaurora.org>

Ensure that the USB gadget is able to support the configuration being
added based on the number of endpoints required from all interfaces.  This
is for accounting for any bandwidth or space limitations.

Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
---
 drivers/usb/gadget/configfs.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index 15a607c..76b9983 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -1374,6 +1374,7 @@ static int configfs_composite_bind(struct usb_gadget *gadget,
 		struct usb_function *f;
 		struct usb_function *tmp;
 		struct gadget_config_name *cn;
+		unsigned long ep_map = 0;
 
 		if (gadget_is_otg(gadget))
 			c->descriptors = otg_desc;
@@ -1403,7 +1404,28 @@ static int configfs_composite_bind(struct usb_gadget *gadget,
 				list_add(&f->list, &cfg->func_list);
 				goto err_purge_funcs;
 			}
+			if (f->fs_descriptors) {
+				struct usb_descriptor_header **d;
+
+				d = f->fs_descriptors;
+				for (; *d; ++d) {
+					struct usb_endpoint_descriptor *ep;
+					int addr;
+
+					if ((*d)->bDescriptorType != USB_DT_ENDPOINT)
+						continue;
+
+					ep = (struct usb_endpoint_descriptor *)*d;
+					addr = ((ep->bEndpointAddress & 0x80) >> 3) |
+						(ep->bEndpointAddress & 0x0f);
+					set_bit(addr, &ep_map);
+				}
+			}
 		}
+		ret = usb_gadget_check_config(cdev->gadget, ep_map);
+		if (ret)
+			goto err_purge_funcs;
+
 		usb_ep_autoconfig_reset(cdev->gadget);
 	}
 	if (cdev->use_os_string) {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply	other threads:[~2021-05-19  7:44 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-19  7:43 [PATCH v8 0/5] Re-introduce TX FIFO resize for larger EP bursting Wesley Cheng
2021-05-19  7:43 ` [PATCH v8 1/5] usb: gadget: udc: core: Introduce check_config to verify USB configuration Wesley Cheng
2021-05-19  7:43 ` Wesley Cheng [this message]
2021-05-19  7:43 ` [PATCH v8 3/5] usb: dwc3: Resize TX FIFOs to meet EP bursting requirements Wesley Cheng
2021-05-19  7:43 ` [PATCH v8 4/5] usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default Wesley Cheng
2021-05-19  7:43 ` [PATCH v8 5/5] arm64: boot: dts: qcom: sm8150: Enable dynamic TX FIFO resize logic Wesley Cheng
2021-05-29 17:07   ` Bjorn Andersson
2021-05-29 19:24     ` Jack Pham
2021-05-29  0:40 ` [PATCH v8 0/5] Re-introduce TX FIFO resize for larger EP bursting Wesley Cheng

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