From 331cbe7f58fcfb60dada4c8a056ca47a0d7d221b Mon Sep 17 00:00:00 2001 From: Witold Sciuk Date: Sat, 13 Feb 2016 11:08:37 +0100 Subject: [PATCH] ANDROID: usb: gadget: f_mtp: Set 0xFFFFFFFF in mtp header ContainerLength field Value 0xFFFFFFFF should be set according specification of MTP for large files when fileSize + mtpHeader is greater than 0xFFFFFFFF. MTP Specification, Appendix H - USB Optimizations Patchset: mtp Change-Id: I6213de052914350be2f87b73f8135f9c0cd05d7c Signed-off-by: Witold Sciuk Signed-off-by: Konrad Leszczynski Signed-off-by: Russ Weight --- drivers/usb/gadget/function/f_mtp.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/f_mtp.c b/drivers/usb/gadget/function/f_mtp.c index b37cc8d87ca4..0fa79b0c26ab 100644 --- a/drivers/usb/gadget/function/f_mtp.c +++ b/drivers/usb/gadget/function/f_mtp.c @@ -43,6 +43,7 @@ #define MTP_BULK_BUFFER_SIZE 16384 #define INTR_BUFFER_SIZE 28 #define MAX_INST_NAME_LEN 40 +#define MTP_MAX_FILE_SIZE 0xFFFFFFFFL /* String IDs */ #define INTERFACE_STRING_INDEX 0 @@ -766,7 +767,12 @@ static void send_file_work(struct work_struct *data) if (hdr_size) { /* prepend MTP data header */ header = (struct mtp_data_header *)req->buf; - header->length = __cpu_to_le32(count); + /* + * set file size with header according to + * MTP Specification v1.0 + */ + header->length = (count > MTP_MAX_FILE_SIZE) ? + MTP_MAX_FILE_SIZE : __cpu_to_le32(count); header->type = __cpu_to_le16(2); /* data packet */ header->command = __cpu_to_le16(dev->xfer_command); header->transaction_id = -- 2.34.1