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| author | Udipto Goswami <quic_ugoswami@quicinc.com> | 2022-12-15 10:59:06 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-06 07:49:39 +0100 |
| commit | bf7ddf96c12beac7058af27fe7ce6e2e499724c5 (patch) | |
| tree | da07cc5b1b16e3b4c5710bf505fcba5653d5c56e /drivers | |
| parent | e9036e951f93fb8d7b5e9d6e2c7f94a4da312ae4 (diff) | |
| download | linux-stable-bf7ddf96c12beac7058af27fe7ce6e2e499724c5.tar.gz linux-stable-bf7ddf96c12beac7058af27fe7ce6e2e499724c5.tar.bz2 linux-stable-bf7ddf96c12beac7058af27fe7ce6e2e499724c5.zip | |
usb: gadget: f_fs: Ensure ep0req is dequeued before free_request
[ Upstream commit ce405d561b020e5a46340eb5146805a625dcacee ]
As per the documentation, function usb_ep_free_request guarantees
the request will not be queued or no longer be re-queued (or
otherwise used). However, with the current implementation it
doesn't make sure that the request in ep0 isn't reused.
Fix this by dequeuing the ep0req on functionfs_unbind before
freeing the request to align with the definition.
Fixes: ddf8abd25994 ("USB: f_fs: the FunctionFS driver")
Signed-off-by: Udipto Goswami <quic_ugoswami@quicinc.com>
Tested-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Link: https://lore.kernel.org/r/20221215052906.8993-3-quic_ugoswami@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -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 b3489a3449f6..48bdb2a3972b 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -1810,6 +1810,8 @@ static void functionfs_unbind(struct ffs_data *ffs) ENTER(); if (!WARN_ON(!ffs->gadget)) { + /* dequeue before freeing ep0req */ + usb_ep_dequeue(ffs->gadget->ep0, ffs->ep0req); mutex_lock(&ffs->mutex); usb_ep_free_request(ffs->gadget->ep0, ffs->ep0req); ffs->ep0req = NULL; |