Am 01.03.2018 um 19:49 schrieb Bjorn Helgaas:
On Wed, Feb 21, 2018 at 10:07:15AM +0100, Christian König wrote:
Is it entirely possible that the BIOS wasn't able to assign resources to
a device. In this case don't crash in pci_release_resource() when we try
to resize the resource.
v2: keep printing the info that we try to release the BAR
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
CC: stable@xxxxxxxxxxxxxxx
I was hoping for a dmesg snippet, but I added a Fixes: tag and applied
this to for-linus for v4.16.
Sorry, been on vacation and missed your mail.
I don't have a dmesg of hand either, cause the reporter provided only a
mail with a picture of the crash :)
But he confirmed that the patch worked.
Thanks,
Christian.
---
drivers/pci/setup-res.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index e815111f3f81..c0f091614805 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -402,6 +402,10 @@ void pci_release_resource(struct pci_dev *dev, int resno)
struct resource *res = dev->resource + resno;
dev_info(&dev->dev, "BAR %d: releasing %pR\n", resno, res);
+
+ if (!res->parent)
+ return;
+
release_resource(res);
res->end = resource_size(res) - 1;
res->start = 0;
--
2.14.1
