diff options
| author | Darrick J. Wong <djwong@us.ibm.com> | 2008-11-12 13:25:36 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-12 17:17:16 -0800 |
| commit | f0f7e0dc7393268947dc3ed285defc3d375487b9 (patch) | |
| tree | 90ffb16affdfcfac145ff8dde775c89f558e599a | |
| parent | fe2d5ffc74a1de6a31e9fd65b65cce72d881edf7 (diff) | |
| download | linux-f0f7e0dc7393268947dc3ed285defc3d375487b9.tar.gz | |
i5000-edac: hold reference to mci kobject
It turns out that edac_mc_del_mc will kobject_put the last kref on the
mci object.
If the timing is just right, that means that the mci object is freed
before before i5000_remove_one has a chance to free the resources
associated with it, causing a null pointer exceptions when unloading the
driver. Insert a kobject_{get,put} pair so that this doesn't happen.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/edac/i5000_edac.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/edac/i5000_edac.c b/drivers/edac/i5000_edac.c index f0d9b415db50..d335086f4a26 100644 --- a/drivers/edac/i5000_edac.c +++ b/drivers/edac/i5000_edac.c @@ -1381,6 +1381,7 @@ static int i5000_probe1(struct pci_dev *pdev, int dev_idx) if (mci == NULL) return -ENOMEM; + kobject_get(&mci->edac_mci_kobj); debugf0("MC: " __FILE__ ": %s(): mci = %p\n", __func__, mci); mci->dev = &pdev->dev; /* record ptr to the generic device */ @@ -1453,6 +1454,7 @@ fail1: i5000_put_devices(mci); fail0: + kobject_put(&mci->edac_mci_kobj); edac_mc_free(mci); return -ENODEV; } @@ -1498,7 +1500,7 @@ static void __devexit i5000_remove_one(struct pci_dev *pdev) /* retrieve references to resources, and free those resources */ i5000_put_devices(mci); - + kobject_put(&mci->edac_mci_kobj); edac_mc_free(mci); } |