diff options
| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2018-08-30 14:50:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-25 11:52:21 +0300 |
| commit | c8dc500fac020debfc198aab0ace2d6a5b7ed236 (patch) | |
| tree | 00398e066eb55a335235833d2589db48dea594a6 /drivers | |
| parent | c83c60771e3bf2445fad590a97111ff418831527 (diff) | |
| download | linux-c8dc500fac020debfc198aab0ace2d6a5b7ed236.tar.xz | |
power: reset: at91-poweroff: do not procede if at91_shdwc is allocated
[ Upstream commit 9f1e44774be578fb92776add95f1fcaf8284d692 ]
There should be only one instance of struct shdwc in the system. This is
referenced through at91_shdwc. Return in probe if at91_shdwc is already
allocated.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/reset/at91-sama5d2_shdwc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c index 90b0b5a70ce5..04ca990e8f6c 100644 --- a/drivers/power/reset/at91-sama5d2_shdwc.c +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -246,6 +246,9 @@ static int __init at91_shdwc_probe(struct platform_device *pdev) if (!pdev->dev.of_node) return -ENODEV; + if (at91_shdwc) + return -EBUSY; + at91_shdwc = devm_kzalloc(&pdev->dev, sizeof(*at91_shdwc), GFP_KERNEL); if (!at91_shdwc) return -ENOMEM; |