diff options
| author | Tanmay Shah <tanmay.shah@amd.com> | 2023-03-10 17:24:04 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-17 11:50:14 +0200 |
| commit | 25361a0155a11416e5f8048319a2d79f0ff4502c (patch) | |
| tree | dbdd85b205d0d4e7e1fd3a53c38d6b5bf460a1ca /drivers/mailbox | |
| parent | f9dd36311bd51a7c3ec43bf2299f2581cce61949 (diff) | |
mailbox: zynqmp: Fix counts of child nodes
[ Upstream commit f72f805e72882c361e2a612c64a6e549f3da7152 ]
If child mailbox node status is disabled it causes
crash in interrupt handler. Fix this by assigning
only available child node during driver probe.
Fixes: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller")
Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230311012407.1292118-2-tanmay.shah@amd.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/mailbox')
| -rw-r--r-- | drivers/mailbox/zynqmp-ipi-mailbox.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c b/drivers/mailbox/zynqmp-ipi-mailbox.c index 136a84ad871c..be06de791c54 100644 --- a/drivers/mailbox/zynqmp-ipi-mailbox.c +++ b/drivers/mailbox/zynqmp-ipi-mailbox.c @@ -634,7 +634,12 @@ static int zynqmp_ipi_probe(struct platform_device *pdev) struct zynqmp_ipi_mbox *mbox; int num_mboxes, ret = -EINVAL; - num_mboxes = of_get_child_count(np); + num_mboxes = of_get_available_child_count(np); + if (num_mboxes == 0) { + dev_err(dev, "mailbox nodes not available\n"); + return -EINVAL; + } + pdata = devm_kzalloc(dev, struct_size(pdata, ipi_mboxes, num_mboxes), GFP_KERNEL); if (!pdata) |