diff options
| author | Tim Blechmann <tim@klingt.org> | 2022-03-13 10:45:41 +0800 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2022-03-13 11:49:48 -0500 |
| commit | cbf58250b33e26d7e8e84919ee71eb1129f91f12 (patch) | |
| tree | 675be0a95bb4081581e0930670910a21515b001e /drivers/rpmsg | |
| parent | db64e7e74bd2abeae58ff65bdf41305f04a60fa1 (diff) | |
| download | linux-cbf58250b33e26d7e8e84919ee71eb1129f91f12.tar.gz | |
rpmsg: char: treat rpmsg_trysend() ENOMEM as EAGAIN
rpmsg_trysend() returns -ENOMEM when no rpmsg buffer can be allocated.
this causes write to fail with this error as opposed to -EAGAIN.
this is what user space applications (and libraries like boost.asio)
would expect when using normal character devices.
Signed-off-by: Tim Blechmann <tim@klingt.org>
Cc: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220313024541.1579848-2-tim@klingt.org
Diffstat (limited to 'drivers/rpmsg')
| -rw-r--r-- | drivers/rpmsg/rpmsg_char.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 5663cf799c953..434dc8a741cc6 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -242,10 +242,13 @@ static ssize_t rpmsg_eptdev_write_iter(struct kiocb *iocb, goto unlock_eptdev; } - if (filp->f_flags & O_NONBLOCK) + if (filp->f_flags & O_NONBLOCK) { ret = rpmsg_trysendto(eptdev->ept, kbuf, len, eptdev->chinfo.dst); - else + if (ret == -ENOMEM) + ret = -EAGAIN; + } else { ret = rpmsg_sendto(eptdev->ept, kbuf, len, eptdev->chinfo.dst); + } unlock_eptdev: mutex_unlock(&eptdev->ept_lock); |