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authorTim Blechmann <tim@klingt.org>2022-03-13 10:45:41 +0800
committerBjorn Andersson <bjorn.andersson@linaro.org>2022-03-13 11:49:48 -0500
commitcbf58250b33e26d7e8e84919ee71eb1129f91f12 (patch)
tree675be0a95bb4081581e0930670910a21515b001e /drivers/rpmsg
parentdb64e7e74bd2abeae58ff65bdf41305f04a60fa1 (diff)
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.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 5663cf799c95..434dc8a741cc 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);