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| author | Libo Chen <clbchenlibo.chen@huawei.com> | 2013-07-08 15:59:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-09 10:33:20 -0700 |
| commit | 34e3a58c66aafd90cc16c061569fbefc3ff451e9 (patch) | |
| tree | 4f3f3e15ed91bc8ad54ac0cf6f8f61a5b7d5f3d2 | |
| parent | 9756b9187eebb093b9f6a154ecceb67648e53391 (diff) | |
| download | linux-34e3a58c66aafd90cc16c061569fbefc3ff451e9.tar.gz linux-34e3a58c66aafd90cc16c061569fbefc3ff451e9.tar.bz2 linux-34e3a58c66aafd90cc16c061569fbefc3ff451e9.zip | |
drivers/iommu/msm_iommu_dev.c: fix leak and clean up error paths
Fix two obvious problems:
1. We have registered msm_iommu_driver first, and need unregister it
when registered msm_iommu_ctx_driver fail
2. We don't need to kfree drvdata before kzalloc was successful.
[akpm@linux-foundation.org: remove now-unneeded initialization of ctx_drvdata, remove unneeded braces]
Signed-off-by: Libo Chen <libo.chen@huawei.com>
Acked-by: David Brown <davidb@codeaurora.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/iommu/msm_iommu_dev.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/drivers/iommu/msm_iommu_dev.c b/drivers/iommu/msm_iommu_dev.c index 9144a6beed92..6ba351477132 100644 --- a/drivers/iommu/msm_iommu_dev.c +++ b/drivers/iommu/msm_iommu_dev.c @@ -291,25 +291,20 @@ static int msm_iommu_ctx_probe(struct platform_device *pdev) { struct msm_iommu_ctx_dev *c = pdev->dev.platform_data; struct msm_iommu_drvdata *drvdata; - struct msm_iommu_ctx_drvdata *ctx_drvdata = NULL; + struct msm_iommu_ctx_drvdata *ctx_drvdata; int i, ret; - if (!c || !pdev->dev.parent) { - ret = -EINVAL; - goto fail; - } - drvdata = dev_get_drvdata(pdev->dev.parent); + if (!c || !pdev->dev.parent) + return -EINVAL; - if (!drvdata) { - ret = -ENODEV; - goto fail; - } + drvdata = dev_get_drvdata(pdev->dev.parent); + if (!drvdata) + return -ENODEV; ctx_drvdata = kzalloc(sizeof(*ctx_drvdata), GFP_KERNEL); - if (!ctx_drvdata) { - ret = -ENOMEM; - goto fail; - } + if (!ctx_drvdata) + return -ENOMEM; + ctx_drvdata->num = c->num; ctx_drvdata->pdev = pdev; @@ -403,6 +398,7 @@ static int __init msm_iommu_driver_init(void) ret = platform_driver_register(&msm_iommu_ctx_driver); if (ret != 0) { + platform_driver_unregister(&msm_iommu_driver); pr_err("Failed to register IOMMU context driver\n"); goto error; } |