From df41a0872fa09118684c6366c757885bc1e50e7b Mon Sep 17 00:00:00 2001 From: morten petersen Date: Mon, 8 Jul 2019 11:41:54 +0000 Subject: [PATCH] mailbox: handle failed named mailbox channel request [ Upstream commit 25777e5784a7b417967460d4fcf9660d05a0c320 ] Previously, if mbox_request_channel_byname was used with a name which did not exist in the "mbox-names" property of a mailbox client, the mailbox corresponding to the last entry in the "mbox-names" list would be incorrectly selected. With this patch, -EINVAL is returned if the named mailbox is not found. Signed-off-by: Morten Borup Petersen Signed-off-by: Jassi Brar Signed-off-by: Sasha Levin --- drivers/mailbox/mailbox.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c index 537f4f6d009b..44b49a2676f0 100644 --- a/drivers/mailbox/mailbox.c +++ b/drivers/mailbox/mailbox.c @@ -391,11 +391,13 @@ struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl, of_property_for_each_string(np, "mbox-names", prop, mbox_name) { if (!strncmp(name, mbox_name, strlen(name))) - break; + return mbox_request_channel(cl, index); index++; } - return mbox_request_channel(cl, index); + dev_err(cl->dev, "%s() could not locate channel named \"%s\"\n", + __func__, name); + return ERR_PTR(-EINVAL); } EXPORT_SYMBOL_GPL(mbox_request_channel_byname); -- 2.20.1