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mailbox: tegra: avoid resume NULL mailboxes

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If Tegra HSP device tree does not have 'shared irqs',
mailboxes pointer is NULL. Add non-NULL HSP mailboxes
check in resume callback before tegra_hsp_mailbox_startup()
call and prevent NULL pointer exception.

Signed-off-by: Bitan Biswas <bbiswas@nvidia.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Bitan Biswas 2019-06-14 09:31:01 -07:00 committed by Jassi Brar
parent b1a399530c
commit 20b5d24c76
1 changed files with 6 additions and 4 deletions
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10
drivers/mailbox/tegra-hsp.c
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@ -782,11 +782,13 @@ static int __maybe_unused tegra_hsp_resume(struct device *dev)
tegra_hsp_doorbell_startup(db->channel.chan);
}
for (i = 0; i < hsp->num_sm; i++) {
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
if (hsp->mailboxes) {
for (i = 0; i < hsp->num_sm; i++) {
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
if (mb->channel.chan->cl)
tegra_hsp_mailbox_startup(mb->channel.chan);
if (mb->channel.chan->cl)
tegra_hsp_mailbox_startup(mb->channel.chan);
}
}
return 0;