USB: f_diag: Report Max request size as 16k for ChipIdea (06bc785f) · Commits · e / devices / android_kernel_oneplus_sm7250

ChipIdea controller can be queued a maximum packet size of 16KB. If a request larger than this size arrives on IN endpoint, request is failed. Fix this by limiting the max request size to 16k if the controller is ChipIdea. Change-Id: Iac696addc9b1ca50e78ae66f73f5b66bd3100c1c Signed-off-by:

Ajay Agarwal <ajaya@codeaurora.org> Signed-off-by:

Vijayavardhan Vennapusa <vvreddy@codeaurora.org> Signed-off-by:

Pratham Pratap <prathampratap@codeaurora.org>

drivers/usb/gadget/function/f_diag.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -462,6 +462,7 @@ int usb_diag_alloc_req(struct usb_diag_ch *ch, int n_write, int n_read)
		}
		EXPORT_SYMBOL(usb_diag_alloc_req);
		#define DWC3_MAX_REQUEST_SIZE (16 * 1024 * 1024)
		#define CI_MAX_REQUEST_SIZE (16 * 1024)
		/**
		* usb_diag_request_size - Max request size for controller
		* @ch: Channel handler
		@@ -471,6 +472,12 @@ EXPORT_SYMBOL(usb_diag_alloc_req);
		*/
		int usb_diag_request_size(struct usb_diag_ch *ch)
		{
		struct diag_context *ctxt = ch->priv_usb;
		struct usb_composite_dev *cdev = ctxt->cdev;

		if (cdev->gadget->is_chipidea)
		return CI_MAX_REQUEST_SIZE;

		return DWC3_MAX_REQUEST_SIZE;
		}
		EXPORT_SYMBOL(usb_diag_request_size);