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misc: fastrpc: Fix device_open when no session is available 

This change fixes fastrpc_device_open() when no session is available and
return an error in such case.

Signed-off-by: Thierry Escande <thierry.escande@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thierry Escande 2019-02-15 10:40:07 +00:00 committed by Greg Kroah-Hartman
parent c0fae22f48
commit 7c11df42d0
1 changed files with 10 additions and 1 deletions
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11
drivers/misc/fastrpc.c
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@ -1016,10 +1016,19 @@ static int fastrpc_device_open(struct inode *inode, struct file *filp)
INIT_LIST_HEAD(&fl->user);
fl->tgid = current->tgid;
fl->cctx = cctx;
fl->sctx = fastrpc_session_alloc(cctx);
if (!fl->sctx) {
dev_err(&cctx->rpdev->dev, "No session available\n");
mutex_destroy(&fl->mutex);
kfree(fl);
return -EBUSY;
}
spin_lock(&cctx->lock);
list_add_tail(&fl->user, &cctx->users);
spin_unlock(&cctx->lock);
fl->sctx = fastrpc_session_alloc(cctx);
return 0;
}