path: root/drivers/mailbox
diff options
authorAlexey Klimov <alexey.klimov@arm.com>2017-03-21 16:57:34 +0000
committerJassi Brar <jaswinder.singh@linaro.org>2017-03-28 23:52:02 +0530
commit4605fff00b886657835a58ef3cf2377356029e55 (patch)
treef98454c954b19a104dff9c87dacac3e35711c0f2 /drivers/mailbox
parentdd32fae0722ddd1235342a4b0c00f91a14b2742c (diff)
mailbox: check ->last_tx_done for NULL in case of timer-based polling
It is allowed by code to register mailbox controller that sets txdone_poll flag to request timer-based polling with missed ->last_tx_done() method. If such thing happens and since presence of last_tx_done() is not checked it will fail in hrtimer callback function txdone_hrtimer() when first message will be transmitted. This patch adds check for this method and logging of error on registration of mailbox controller if it requested timer-based polling. Signed-off-by: Alexey Klimov <alexey.klimov@arm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 4671f8a12872..59b722177bf7 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c
@@ -453,6 +453,12 @@ int mbox_controller_register(struct mbox_controller *mbox)
txdone = TXDONE_BY_ACK;
if (txdone == TXDONE_BY_POLL) {
+ if (!mbox->ops->last_tx_done) {
+ dev_err(mbox->dev, "last_tx_done method is absent\n");
+ return -EINVAL;
+ }
hrtimer_init(&mbox->poll_hrt, CLOCK_MONOTONIC,
mbox->poll_hrt.function = txdone_hrtimer;

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