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mailbox: handle failed named mailbox channel request
[ Upstream commit 25777e5784
]
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 <morten_bp@live.dk>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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parent
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commit
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1 changed files with 4 additions and 2 deletions
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@ -391,11 +391,13 @@ struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
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of_property_for_each_string(np, "mbox-names", prop, mbox_name) {
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if (!strncmp(name, mbox_name, strlen(name)))
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break;
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return mbox_request_channel(cl, index);
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index++;
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}
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return mbox_request_channel(cl, index);
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dev_err(cl->dev, "%s() could not locate channel named \"%s\"\n",
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__func__, name);
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return ERR_PTR(-EINVAL);
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}
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EXPORT_SYMBOL_GPL(mbox_request_channel_byname);
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