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| author | Dongwoo Lee <dwoo08.lee@samsung.com> | 2023-08-21 20:25:43 +0900 |
|---|---|---|
| committer | Dongwoo Lee <dwoo08.lee@samsung.com> | 2023-08-21 20:34:25 +0900 |
| commit | 907f728394677d0ef794df34f4d52170f6a3adeb (patch) | |
| tree | 21fd2f29d4fb3dd85295ed9137337e1ec081d5d1 | |
| parent | 3bfec121f53962e327b501b80b32213bbf3c22eb (diff) | |
| download | linux-starfive-907f728394677d0ef794df34f4d52170f6a3adeb.tar.gz linux-starfive-907f728394677d0ef794df34f4d52170f6a3adeb.tar.bz2 linux-starfive-907f728394677d0ef794df34f4d52170f6a3adeb.zip | |
usb: gadget: f_fs: Limit the maximum length of data transferringaccepted/tizen/unified/riscv/20230822.054229
When the ffs daemons request transfer with large size buffer, the usb
subsystems below cannot filled the buffer at once and then the request
is stalled in f_fs_epfile_io function. In order to prevent this
situation, this limits maximum length of data as PAGE_SIZE.
Change-Id: Ib84b3493a56b21f33a07cf0533f8df71580b7540
Signed-off-by: Dongwoo Lee <dwoo08.lee@samsung.com>
| -rw-r--r-- | drivers/usb/gadget/function/f_fs.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index 3e59055aa504..c6a52e7424fd 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -1013,6 +1013,8 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data) goto error_lock; } data_len = iov_iter_count(&io_data->data); + data_len = data_len > PAGE_SIZE ? PAGE_SIZE : data_len; + /* * Controller may require buffer size to be aligned to * maxpacketsize of an out endpoint. |