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mailbox: add sanity check for channel array 

Fail gracefully if there is no channel array attached to the mailbox
controller. Otherwise the later dereference will cause an OOPS which
might not be seen because mailbox controllers might instantiate very
early. Remove the comment explaining the obvious while here.

Fixes: 2b6d83e2b8 ("mailbox: Introduce framework for mailbox")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
master
Wolfram Sang 2026-04-13 12:42:38 +02:00 committed by Jassi Brar
parent c02053a905
commit c1aad75595
1 changed files with 1 additions and 2 deletions
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3
drivers/mailbox/mailbox.c
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@ -526,8 +526,7 @@ int mbox_controller_register(struct mbox_controller *mbox)
{
int i, txdone;
/* Sanity check */
if (!mbox || !mbox->dev || !mbox->ops || !mbox->num_chans)
if (!mbox || !mbox->dev || !mbox->ops || !mbox->chans || !mbox->num_chans)
return -EINVAL;
if (mbox->txdone_irq)